Add tests for themes

* master:
  Fix " > base64State is not defined"
  chore(deps-dev): bump svelte-preprocess from 4.8.0 to 4.9.4
  chore(deps-dev): bump eslint-plugin-cypress from 2.11.3 to 2.12.1
  chore(deps-dev): bump cypress from 8.3.1 to 8.4.0
  chore(deps-dev): bump @typescript-eslint/eslint-plugin
  chore(deps): bump js-base64 from 3.7.0 to 3.7.1
  chore(deps-dev): bump svelte from 3.42.5 to 3.42.6
  chore(deps): bump node from 16.9.0 to 16.9.1
  chore(deps-dev): bump prettier from 2.4.0 to 2.4.1
  chore(deps-dev): bump @sveltejs/adapter-static
  chore(deps-dev): bump @typescript-eslint/parser from 4.31.0 to 4.31.1

.eslintrc.cjs

@@ -0,0 +1,48 @@
+module.exports = {
+	root: true,
+	parser: '@typescript-eslint/parser',
+	extends: [
+		'eslint:recommended',
+		'plugin:@typescript-eslint/recommended',
+		// 'plugin:@typescript-eslint/recommended-requiring-type-checking',
+		'prettier'
+	],
+	plugins: ['svelte3', 'tailwindcss', '@typescript-eslint', 'es'],
+	ignorePatterns: [
+		'docs/*',
+		'*.cjs',
+		'*.md',
+		'snapshots.js',
+		'svelte.config.js',
+		'renovate.json',
+		'package.json',
+		'tsconfig.json'
+	],
+	overrides: [{ files: ['*.svelte'], processor: 'svelte3/svelte3' }],
+	settings: {
+		'svelte3/typescript': () => require('typescript')
+	},
+	parserOptions: {
+		sourceType: 'module',
+		ecmaVersion: 2019,
+		tsconfigRootDir: __dirname,
+		project: ['./tsconfig.json'],
+		extraFileExtensions: ['.svelte']
+	},
+	env: {
+		browser: true,
+		es2017: true,
+		node: true
+	},
+	rules: {
+		'@typescript-eslint/ban-ts-comment': [
+			'error',
+			{
+				'ts-ignore': 'allow-with-description'
+			}
+		],
+		'@typescript-eslint/no-unsafe-member-access': 'off',
+		'@typescript-eslint/no-unsafe-assignment': 'off',
+		'es/no-regexp-lookbehind-assertions': 'error'
+	}
+};

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,41 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Link to Live Editor:
+Steps to reproduce the behavior:
+
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+
+- OS: [e.g. iOS]
+- Browser [e.g. chrome, safari]
+- Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+
+- Device: [e.g. iPhone6]
+- OS: [e.g. iOS8.1]
+- Browser [e.g. stock browser, safari]
+- Version [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,19 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/codeql/config.yml

@@ -0,0 +1,7 @@
+name: 'Mermaid CodeQL config'
+
+paths:
+  - src
+paths-ignore:
+  - node_modules
+  - '**/*.spec.js'

.github/dependabot.yml

@@ -0,0 +1,20 @@
+version: 2
+updates:
+  - package-ecosystem: docker
+    directory: /
+    target-branch: develop
+    schedule:
+      interval: weekly
+      day: friday
+  - package-ecosystem: github-actions
+    directory: /
+    target-branch: develop
+    schedule:
+      interval: weekly
+      day: friday
+  - package-ecosystem: npm
+    directory: /
+    target-branch: develop
+    schedule:
+      interval: weekly
+      day: friday

.github/pull_request_template.md

@@ -1,13 +1,17 @@
 ## :bookmark_tabs: Summary
+
 Brief description about the content of your PR:
 
 Resolves #<your issue id here>
 
 ## :straight_ruler: Design Decisions
+
 Describe the way your implementation works or what design decisions you made if applicable:
 
 ### :clipboard: Tasks
+
 Make sure you
-- [ ] :book: have read the [contribution guidelines](https://github.com/mermaid-js/mermaid/blob/develop/CONTRIBUTING.md) 
-- [ ] :computer: have added unit/e2e tests (if appropriate) 
-- [ ] :bookmark: targeted `master` branch 
+
+- [ ] :book: have read the [contribution guidelines](https://github.com/mermaid-js/mermaid/blob/master/CONTRIBUTING.md)
+- [ ] :computer: have added unit/e2e tests (if appropriate)
+- [ ] :bookmark: targeted `develop` branch

.github/workflows/codeql-analysis.yml

@@ -9,14 +9,14 @@
 # the `language` matrix defined below to confirm you have the correct set of
 # supported CodeQL languages.
 #
-name: "CodeQL"
+name: 'CodeQL'
 
 on:
   push:
-    branches: [ master ]
+    branches: [master]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [ master ]
+    branches: [master]
   schedule:
     - cron: '36 1 * * 2'
 
@@ -28,40 +28,41 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: [ 'javascript' ]
+        language: ['javascript']
         # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
         # Learn more:
         # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v2
+      - name: Checkout repository
+        uses: actions/checkout@v2
 
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
-        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        with:
+          config-file: ./.github/codeql/config.yml
+          languages: ${{ matrix.language }}
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
+          # queries: ./path/to/local/query, your-org/your-repo/queries@main
 
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      # - name: Autobuild
+      #   uses: github/codeql-action/autobuild@v1
 
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 https://git.io/JvXDl
 
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
+      # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+      #    and modify them (or add more) to build your code if your project
+      #    uses a compiled language
 
-    #- run: |
-    #   make bootstrap
-    #   make release
+      #- run: |
+      #   make bootstrap
+      #   make release
 
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1

.github/workflows/cypress.yml

@@ -0,0 +1,46 @@
+name: Cypress Tests
+
+on:
+  pull_request:
+    branches:
+      - master
+      - develop
+
+jobs:
+  cypress-run:
+    runs-on: ubuntu-latest
+    # Update after https://github.com/cypress-io/cypress-docker-images/issues/487
+    container: cypress/browsers:node14.16.0-chrome90-ff88
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - uses: actions/cache@v2
+        id: yarn-and-build-cache
+        with:
+          path: |
+            ~/.cache/Cypress
+            build
+            node_modules
+          key: ${{ runner.os }}-node_modules-build-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-node_modules-build-
+
+      - name: Lint
+        run: |
+          yarn install
+          yarn run lint
+
+      # Install NPM dependencies, cache them correctly
+      # and run all Cypress tests
+      - name: Cypress run
+        uses: cypress-io/github-action@v2
+        with:
+          build: yarn build
+          start: yarn preview
+          wait-on: 'http://localhost:3000'
+          record: true
+          headless: true
+        env:
+          CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}

.github/workflows/deploy.yml

@@ -0,0 +1,53 @@
+name: Deploy Live Editor
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+      - develop
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '16'
+
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+
+      - uses: actions/cache@v2
+        id: yarn-cache
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+
+      - name: Build & Deploy
+        run: |
+          npm i -g yarn
+          export DEPLOY=true
+          [ "$GITHUB_EVENT_NAME" == "pull_request" ] && export BETA=true && rm -rf docs/beta/
+          [ "$GITHUB_EVENT_NAME" != "pull_request" ] && rm -rf docs/_app/
+          yarn install
+          yarn run lint
+          version=$(yarn version --patch --no-git-tag-version | grep "New version" | cut -d':' -f 2)
+          yarn build
+          cd bin
+          ./fix-path
+          cd ..
+
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        if: ${{ github.ref == 'refs/heads/master' }}
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs
+          keep_files: true

.github/workflows/docker-publish.yml

@@ -0,0 +1,69 @@
+name: Docker
+
+on:
+  push:
+    # Publish `master` as Docker `latest` image.
+    branches:
+      - master
+
+    # Publish `v1.2.3` tags as releases.
+    tags:
+      - v*
+
+  # Run tests for all PRs to master and develop.
+  pull_request:
+    branches:
+      - master
+      - develop
+
+env:
+  IMAGE_NAME: mermaid-live-editor
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Run tests
+        run: |
+          docker build . --file Dockerfile
+
+  push:
+    # Ensure test job passes before pushing image.
+    needs: test
+
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Build image
+        run: docker build . --file Dockerfile --tag $IMAGE_NAME
+
+      - name: Log into registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+
+      - name: Push image
+        run: |
+          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME
+
+          # Change all uppercase to lowercase
+          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
+
+          # Strip git ref prefix from version
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+
+          # Strip "v" prefix from tag name
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+
+          # Use Docker `latest` tag convention
+          [ "$VERSION" == "master" ] && VERSION=latest
+
+          echo IMAGE_ID=$IMAGE_ID
+          echo VERSION=$VERSION
+
+          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION

.github/workflows/stale.yml

@@ -0,0 +1,17 @@
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+    - cron: '0 0 * * 4'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v4
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          exempt-issue-labels: 'retained'
+          exempt-pr-labels: 'retained'
+          stale-issue-message: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 7 days'
+          stale-pr-message: 'This pr is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 7 days'

.gitignore

@@ -4,3 +4,10 @@ coverage/
 build/
 yarn-error.log
 .npmrc
+.DS_Store
+/.svelte-kit
+/build
+/functions
+/snapshots.js
+/cypress/videos
+/cypress/screenshots

.husky/.gitignore

@@ -0,0 +1 @@
+_

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+yarn pre-commit

.npmrc

@@ -0,0 +1 @@
+engine-strict=true

.prettierignore

@@ -1 +1,6 @@
-docs
+docs/**
+.svelte-kit/**
+static/**
+build/**
+node_modules/**
+snapshots.js

.prettierrc

@@ -1,3 +1,8 @@
 {
-    "singleQuote": true
-}
+	"singleQuote": true,
+	"svelteSortOrder": "options-scripts-markup-styles",
+	"svelteBracketNewLine": false,
+	"useTabs": true,
+	"trailingComma": "none",
+	"printWidth": 100
+}

Dockerfile

@@ -6,9 +6,7 @@
 # Stop               : press ctrl + c 
 #                                     or 
 #                                        docker stop mermaid-live-editor
-
-
-FROM node:13.6.0-alpine as mermaid-live-editor-builder
+FROM node:16.9.1 as mermaid-live-editor-builder 
 COPY --chown=node:node . /home
 WORKDIR /home
 RUN yarn install

README.md

@@ -1,6 +1,6 @@
-[![Join our Slack!](https://img.shields.io/static/v1?message=join%20chat&color=9cf&logo=slack&label=slack)](https://join.slack.com/t/mermaid-talk/shared_invite/enQtNzc4NDIyNzk4OTAyLWVhYjQxOTI2OTg4YmE1ZmJkY2Y4MTU3ODliYmIwOTY3NDJlYjA0YjIyZTdkMDMyZTUwOGI0NjEzYmEwODcwOTE)
+[![Mermaid Live Editor](https://img.shields.io/endpoint?url=https://dashboard.cypress.io/badge/detailed/2ckppp/master&style=flat&logo=cypress)](https://dashboard.cypress.io/projects/2ckppp/runs) [![Join our Slack!](https://img.shields.io/static/v1?message=join%20chat&color=9cf&logo=slack&label=slack)](https://join.slack.com/t/mermaid-talk/shared_invite/enQtNzc4NDIyNzk4OTAyLWVhYjQxOTI2OTg4YmE1ZmJkY2Y4MTU3ODliYmIwOTY3NDJlYjA0YjIyZTdkMDMyZTUwOGI0NjEzYmEwODcwOTE)[![Netlify Status](https://api.netlify.com/api/v1/badges/27fa023d-7c73-4a3f-9791-b3b657a47100/deploy-status)](https://app.netlify.com/sites/mermaidjs/deploys)
 
-# Contributors are welcome
+# Contributors are welcome!
 
 If you want to speed up the progress for mermaid-live-editor, join the slack channel and contact knsv.
 
@@ -8,7 +8,6 @@ If you want to speed up the progress for mermaid-live-editor, join the slack cha
 
 Edit, preview and share mermaid charts/diagrams.
 
-
 ## Features
 
 - Edit and preview flowcharts, sequence diagrams, gantt diagrams in real time.
@@ -16,46 +15,38 @@ Edit, preview and share mermaid charts/diagrams.
 - Get a link to a viewer of the diagram so that you can share it with others.
 - Get a link to edit the diagram so that someone else can tweak it and send a new link back
 
-
 ## Live demo
 
-You can try out a live version [here](https://mermaid-js.github.io/mermaid-live-editor/).
+You can try out a live version [here](https://mermaid.live/).
+
+## Docker
+
+```bash
+docker run --publish 8000:80 ghcr.io/mermaid-js/mermaid-live-editor
+```
+
+Then open http://localhost:8000
 
 ## Setup
 
+[Volta](https://volta.sh) is used for managing node and yarn versions.
+
 This project is set up using [Yarn](https://classic.yarnpkg.com/en/docs/getting-started):
 
 ```
 yarn install
 ```
 
-or in develop branch to use the beta version of mermaid use
-
-```
-yarn install --update-checksums
-```
-
-This together with a .npmrc file:
-
-```
-registry=https://registry.npmjs.com/
-@mermaid-js:registry=https://npm.pkg.github.com
-//npm.pkg.github.com/:_authToken="XXXXXXXXX"
-```
-
-
 ## Development
 
 ```
-yarn dev
-open http://localhost:8080
+yarn dev -- --open
 ```
 
-This app is created with Svelte + svelte-spa-router.
-
+This app is created with Svelte Kit.
 
 ## Release
 
-```
-yarn release
-```
+When a PR is created targeting master, it will be built and deployed as a beta in http://mermaid-js.github.io/mermaid-live-editor/beta
+
+Once the PR is merged, it will automatically be released.

bin/beta-release

@@ -4,11 +4,18 @@
 
 # git clone git@github.com:mermaid-js/docs.git
 # git clone https://github.com/mermaid-js/docs.git
-
+set -e
+rm -rf docs
 yarn release
 pushd .
+if [ ! -d ../docs ]; then
+  echo "Clone https://github.com/mermaid-js/docs to parent folder before continuing." 
+  exit
+fi
+rm -rf ../docs/mermaid-live-editor-beta/* 
 cp -r docs/* ../docs/mermaid-live-editor-beta
 cd ../docs
-git commit * -m "Beta updated with latest changes"
+git add .
+git commit -m "Beta updated with latest changes"
 git push
 popd

bin/fix-path

@@ -0,0 +1,6 @@
+#!/bin/bash
+pushd ../docs
+# find ./ -type f -exec sed -i 's/service-worker.js/mermaid-live-editor\/service-worker.js/g' {} \;
+find ./ -type f -exec sed -i 's/manifest.json/\/mermaid-live-editor\/manifest.json/g' {} \;
+find ./ -type f -exec sed -i 's/favicon.png/\/mermaid-live-editor\/favicon.png/g' {} \;
+popd

cypress.json

@@ -0,0 +1,11 @@
+{
+	"projectId": "2ckppp",
+	"$schema": "https://on.cypress.io/cypress.schema.json",
+	"baseUrl": "http://localhost:3000",
+	"pluginsFile": "./cypress/plugins/index.cjs",
+	"viewportWidth": 1440,
+	"viewportHeight": 768,
+	"snapshotFileName": "./cypress/snapshots.js",
+	"defaultCommandTimeout": 16000,
+	"requestTimeout": 16000
+}

cypress/.eslintrc

@@ -0,0 +1,12 @@
+{
+	"plugins": ["cypress", "mocha"],
+	"extends": ["plugin:cypress/recommended", "plugin:mocha/recommended"],
+	"rules": {
+		"jest/expect-expect": "off",
+		"mocha/no-mocha-arrows": "off"
+	},
+	"env": {
+		"cypress/globals": true,
+		"mocha": true
+	}
+}

cypress/fixtures/example.json

@@ -0,0 +1,5 @@
+{
+	"name": "Using fixtures to represent data",
+	"email": "hello@cypress.io",
+	"body": "Fixtures are a great way to mock data for responses to routes"
+}

cypress/integration/actions.spec.ts

@@ -0,0 +1,24 @@
+describe('Check actions', () => {
+	beforeEach(() => {
+		cy.clearLocalStorage();
+		cy.visit('/edit');
+	});
+	it('should update markdown code', () => {
+		cy.get('#markdown')
+			.invoke('val')
+			.then((oldText) => {
+				cy.get('#editor').click('bottom').type('{enter}C --> HistoryTest');
+				cy.get('#markdown')
+					.invoke('val')
+					.then((newText) => {
+						expect(oldText).to.not.eq(newText);
+					});
+			});
+	});
+
+	it('should load gists from URL', () => {
+		cy.get('#gist').type('https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a');
+		cy.contains('Load Gist').click();
+		cy.contains('Go shopping!!');
+	});
+});

cypress/integration/diagramUpdate.spec.ts

@@ -0,0 +1,33 @@
+describe('Auto sync tests', () => {
+	beforeEach(() => {
+		cy.clearLocalStorage();
+		cy.visit('/');
+	});
+	it('should dim diagram when code is edited', () => {
+		cy.contains('Auto sync').click();
+		cy.get('#view').should('not.have.class', 'outOfSync');
+		cy.get('#editor').type('  C --> Test');
+		cy.get('#view').should('have.class', 'outOfSync');
+		cy.getLocalStorage('codeStore').snapshot();
+	});
+
+	it('should show/hide sync button with auto sync', () => {
+		cy.get('[data-cy=sync]').should('not.exist');
+		cy.contains('Auto sync').click();
+		cy.get('[data-cy=sync]').should('exist');
+		cy.get('#autoSync').check();
+		cy.get('[data-cy=sync]').should('not.exist');
+	});
+	it('should not dim diagram when code is in sync', () => {
+		cy.contains('Auto sync').click();
+		cy.get('#view').should('not.have.class', 'outOfSync');
+		cy.get('#editor').type('  C --> Test');
+		cy.get('#view').should('have.class', 'outOfSync');
+		cy.get('[data-cy=sync]').click();
+		cy.get('#view').should('not.have.class', 'outOfSync');
+		cy.get('#autoSync').check();
+		cy.get('#editor').type('ing');
+		cy.get('#view').should('not.have.class', 'outOfSync');
+		cy.getLocalStorage('codeStore').snapshot();
+	});
+});

cypress/integration/history.spec.ts

@@ -0,0 +1,63 @@
+describe('Save History', () => {
+	beforeEach(() => {
+		cy.clock();
+		cy.clearLocalStorage();
+		cy.visit('/edit');
+		cy.contains('Actions').click();
+		cy.contains('History').click();
+	});
+
+	it('should save when clicked', () => {
+		cy.get('#historyList').find('li').should('have.length', 0);
+		cy.get('#historyList').contains('No items in History');
+		cy.get('#saveHistory').click();
+		cy.get('#historyList').find('No items in History').should('not.exist');
+		cy.get('#historyList').find('li').should('have.length', 1);
+		cy.get('#saveHistory').click();
+		cy.on('window:alert', (str) => {
+			expect(str).to.equal('State already saved.');
+		});
+		cy.on('window:confirm', () => true);
+		cy.get('#editor').type('  C --> HistoryTest');
+		cy.get('#saveHistory').click();
+		cy.get('#historyList').find('li').should('have.length', 2);
+	});
+
+	it('should be able to restore and delete', () => {
+		cy.get('#saveHistory').click();
+		cy.get('#editor').type('  C --> HistoryTest');
+		cy.get('#historyList').find('No items in History').should('not.exist');
+		cy.get('#historyList').find('li').should('have.length', 1);
+		cy.contains('HistoryTest');
+		cy.contains('Restore').click();
+		cy.contains('HistoryTest').should('not.exist');
+		cy.contains('Delete').click();
+		cy.get('#historyList').find('li').should('have.length', 0);
+		cy.get('#historyList').contains('No items in History');
+		cy.get('#saveHistory').click();
+		cy.get('#editor').type('  C --> HistoryTest');
+		cy.get('#saveHistory').click();
+		cy.get('#editor').type('ing');
+		cy.get('#clearHistory').click();
+		cy.on('window:alert', (str) => {
+			expect(str).to.equal('Clear all saved items?');
+		});
+		cy.on('window:confirm', () => true);
+		cy.get('#historyList').contains('No items in History');
+	});
+
+	it('should auto save history', () => {
+		cy.get('#editor').type('  C --> HistoryTest');
+		cy.tick(70000);
+		cy.contains('Timeline').click();
+		cy.get('#historyList').find('li').should('have.length', 1);
+		cy.get('#editor').type('ing');
+		cy.tick(70000);
+		cy.get('#historyList').find('li').should('have.length', 2);
+		for (let i = 0; i < 31; i++) {
+			cy.get('#editor').type('.');
+			cy.tick(70000);
+		}
+		cy.get('#historyList').find('li').should('have.length', 30);
+	});
+});

cypress/integration/loadSite.spec.ts

@@ -0,0 +1,91 @@
+import { toBase64 } from 'js-base64';
+
+describe('Site Loads', () => {
+	beforeEach(() => {
+		cy.clearLocalStorage();
+	});
+	it('Check Home page load', () => {
+		cy.visit('/');
+		cy.url().should('include', '/edit');
+		cy.contains('History').click();
+		cy.getLocalStorage('codeStore').snapshot();
+	});
+
+	it('Check Redirect from old URL', () => {
+		cy.visit(
+			'/#/edit/eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW0NocmlzdG1hc10gLS0-fEdldCBtb25leXwgQihHbyBzaG9wcGluZylcbiAgICBCIC0tPiBDe0xldCBtZSB0aGlua31cbiAgICBDIC0tPnxPbmV8IERbTGFwdG9wXVxuICAgIEMgLS0-fFR3b3wgRVtpUGhvbmVdXG4gICAgQyAtLT58VGhyZWV8IEZbZmE6ZmEtY2FyIENhcl0iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9LCJ1cGRhdGVFZGl0b3IiOmZhbHNlfQ'
+		);
+		cy.url().should(
+			'include',
+			'/edit/eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW0NocmlzdG1hc10gLS0-fEdldCBtb25leXwgQihHbyBzaG9wcGluZylcbiAgICBCIC0tPiBDe0xldCBtZSB0aGlua31cbiAgICBDIC0tPnxPbmV8IERbTGFwdG9wXVxuICAgIEMgLS0-fFR3b3wgRVtpUGhvbmVdXG4gICAgQyAtLT58VGhyZWV8IEZbZmE6ZmEtY2FyIENhcl0iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9LCJ1cGRhdGVFZGl0b3IiOmZhbHNlfQ'
+		);
+
+		cy.contains('History').click();
+		cy.getLocalStorage('codeStore').snapshot();
+	});
+
+	it('should load sample diagrams when clicked', () => {
+		cy.contains('Sample Diagrams').click();
+		cy.contains('Pie Chart').click();
+		cy.contains('pie title Pets adopted by volunteers');
+		cy.contains('Class Diagram').click();
+		cy.contains('classDiagram');
+	});
+
+	it('should load diagram from gist', () => {
+		cy.visit(`/edit?gist=https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a`);
+		cy.contains('History').click();
+		cy.contains('Go shopping!!');
+		cy.contains('Revisions');
+		cy.contains('sidharthv96 v8f8f1e2');
+		cy.contains('sidharthv96 v7851e19');
+		cy.getLocalStorage('codeStore').snapshot();
+	});
+
+	it('should load diagram from gist revision', () => {
+		cy.visit(
+			'/edit?gist=https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/ec9b4ab0e41e4ff6287326cd3cb47affd7851e19'
+		);
+		cy.contains('History').click();
+		cy.contains('Party');
+		cy.contains('Revisions');
+		cy.contains('sidharthv96 v7851e19');
+		cy.getLocalStorage('codeStore').snapshot();
+	});
+
+	it('should load diagram from raw files', () => {
+		cy.visit(
+			'/edit?code=https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/code.mmd&config=https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/config.json'
+		);
+		cy.contains('Party');
+		cy.getLocalStorage('codeStore').snapshot();
+	});
+
+	it('should prevent setting the "securityLevel" option via URL', () => {
+		const b64State = toBase64(
+			`{"code":"graph TD\\nA[\\"<img src='https://via.placeholder.com/64' width=64 />\\"]","mermaid":"{\\"securityLevel\\": \\"loose\\", \\"theme\\": \\"forest\\"}","updateEditor":true,"autoSync":true,"updateDiagram":true}`,
+			true
+		);
+		cy.on('window:confirm', () => true);
+		cy.visit(`/edit#${b64State}`);
+		cy.contains('Config').click();
+		cy.contains('forest');
+		cy.contains('securityLevel').should('not.exist');
+		cy.get('#view').find('img').should('not.exist');
+		cy.get('#view').contains('<img');
+		cy.get('#view').contains('src="https://via.placeholder.com/64"');
+	});
+
+	it('should allow persisting "securityLevel" using confirm dialogue', () => {
+		const b64State = toBase64(
+			`{"code":"graph TD\\nA[\\"<img src='https://via.placeholder.com/64' width=64/>\\"]","mermaid":"{\\"securityLevel\\": \\"loose\\", \\"theme\\": \\"forest\\"}","updateEditor":true,"autoSync":true,"updateDiagram":true}`,
+			true
+		);
+		cy.on('window:confirm', () => false);
+		cy.visit(`/edit#${b64State}`);
+		cy.contains('Config').click();
+		cy.contains('forest');
+		cy.contains('securityLevel');
+		cy.get('#view').find('img').should('be.visible');
+	});
+});

cypress/integration/themes.spec.ts

@@ -0,0 +1,57 @@
+describe('Test themes', () => {
+	describe('Test light themes', () => {
+		beforeEach(() => {
+			cy.clearLocalStorage();
+			cy.visit('/edit', {
+				onBeforeLoad(win) {
+					cy.stub(win, 'matchMedia')
+						.callThrough()
+						.withArgs('(prefers-color-scheme: dark)')
+						.returns({
+							matches: false
+						});
+				}
+			});
+			cy.contains('Change Theme').click();
+		});
+
+		it('should set light theme as default', () => {
+			cy.contains('light').parent().should('have.class', 'bordered');
+			cy.contains('dark').parent().should('not.have.class', 'bordered');
+			cy.getLocalStorage('themeStore').snapshot();
+		});
+
+		it('should change themes when clicked', () => {
+			cy.contains('light').parent().should('have.class', 'bordered');
+			cy.contains('cupcake').click();
+			cy.contains('cupcake').parent().should('have.class', 'bordered');
+			cy.contains('light').parent().should('not.have.class', 'bordered');
+			cy.contains('dark').parent().should('not.have.class', 'bordered');
+			cy.getLocalStorage('themeStore').snapshot();
+		});
+	});
+
+	describe('Test dark mode', () => {
+		// eslint-disable-next-line mocha/no-hooks-for-single-case
+		beforeEach(() => {
+			cy.clearLocalStorage();
+			cy.visit('/edit', {
+				onBeforeLoad(win) {
+					cy.stub(win, 'matchMedia')
+						.callThrough()
+						.withArgs('(prefers-color-scheme: dark)')
+						.returns({
+							matches: true
+						});
+				}
+			});
+			cy.contains('Change Theme').click();
+		});
+
+		it('should set dark theme as default', () => {
+			cy.contains('light').parent().should('not.have.class', 'bordered');
+			cy.contains('dark').parent().should('have.class', 'bordered');
+			cy.getLocalStorage('themeStore').snapshot();
+		});
+	});
+});

cypress/plugins/index.cjs

@@ -0,0 +1,31 @@
+/// <reference types="cypress" />
+// ***********************************************************
+// This example plugins/index.js can be used to load plugins
+//
+// You can change the location of this file or turn off loading
+// the plugins file with the 'pluginsFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/plugins-guide
+// ***********************************************************
+
+// This function is called when a project is opened or re-opened (e.g. due to
+// the project's config changing)
+
+/**
+ * @type {Cypress.PluginConfig}
+ */
+// eslint-disable-next-line no-unused-vars
+import * as fs from 'fs';
+
+module.exports = (on, config) => {
+	on('task', {
+		readFileMaybe(filename) {
+			if (fs.existsSync(filename)) {
+				return fs.readFileSync(filename, 'utf8');
+			}
+
+			return null;
+		}
+	});
+};

cypress/snapshots.js

@@ -0,0 +1,52 @@
+module.exports = {
+  "Site Loads": {
+    "Check Home page load": {
+      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n  \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"updateEditor\":true,\"autoSync\":true,\"updateDiagram\":true}"
+    },
+    "Check Redirect from old URL": {
+      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":true}"
+    },
+    "should load diagram from gist": {
+      "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping!!)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello world\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"gist\",\"config\":{\"url\":\"https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a\"}}}"
+    },
+    "should load diagram from gist revision": {
+      "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"gist\",\"config\":{\"url\":\"https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/ec9b4ab0e41e4ff6287326cd3cb47affd7851e19\"}}}"
+    },
+    "should load diagram from raw files": {
+      "1": "{\"code\":\"graph TD\\n    A[Party] -->|Get money| B(Go shopping!!)\\n    \",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"forest\\\",\\n  \\\"test\\\": \\\"hello world\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":true,\"loader\":{\"type\":\"files\",\"config\":{\"codeURL\":\"https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/code.mmd\",\"configURL\":\"https://gist.githubusercontent.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/raw/4eb03887e6a41397e80bdcdbf94017c498f8f1e2/config.json\"}}}"
+    }
+  },
+  "__version": "8.4.0",
+  "Auto sync tests": {
+    "should dim diagram when code is edited": {
+      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n    C --> Test\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"updateEditor\":false,\"autoSync\":false,\"updateDiagram\":false}"
+    },
+    "should not dim diagram when code is in sync": {
+      "1": "{\"code\":\"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)\\n    B --> C{Let me think}\\n    C -->|One| D[Laptop]\\n    C -->|Two| E[iPhone]\\n    C -->|Three| F[fa:fa-car Car]\\n    C --> Testing\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"updateEditor\":false,\"autoSync\":true,\"updateDiagram\":false}"
+    }
+  },
+  "Test themes": {
+    "should set light theme as default": {
+      "1": "{\"theme\":\"light\",\"isDark\":false}"
+    },
+    "should change themes when clicked": {
+      "1": "{\"theme\":\"cupcake\",\"isDark\":false}"
+    },
+    "should set dark theme as default": {
+      "1": "{\"theme\":\"dark\",\"isDark\":true}"
+    },
+    "Test light themes": {
+      "should set light theme as default": {
+        "1": "{\"theme\":\"light\",\"isDark\":false}"
+      },
+      "should change themes when clicked": {
+        "1": "{\"theme\":\"cupcake\",\"isDark\":false}"
+      }
+    },
+    "Test dark mode": {
+      "should set dark theme as default": {
+        "1": "{\"theme\":\"dark\",\"isDark\":true}"
+      }
+    }
+  }
+}

cypress/support/commands.ts

@@ -0,0 +1,38 @@
+// ***********************************************
+// This example commands.js shows you how to
+// create various custom commands and overwrite
+// existing commands.
+//
+// For more comprehensive examples of custom
+// commands please read more here:
+// https://on.cypress.io/custom-commands
+// ***********************************************
+//
+//
+// -- This is a parent command --
+// Cypress.Commands.add('login', (email, password) => { ... })
+//
+//
+// -- This is a child command --
+// Cypress.Commands.add('drag', { prevSubject: 'element'}, (subject, options) => { ... })
+//
+//
+// -- This is a dual command --
+// Cypress.Commands.add('dismiss', { prevSubject: 'optional'}, (subject, options) => { ... })
+//
+//
+// -- This will overwrite an existing command --
+// Cypress.Commands.overwrite('visit', (originalFn, url, options) => { ... })
+import { register } from '@cypress/snapshot';
+// eslint-disable-next-line @typescript-eslint/no-unsafe-call
+register();
+declare global {
+	// eslint-disable-next-line @typescript-eslint/no-namespace
+	namespace Cypress {
+		interface Chainable {
+			snapshot(): void;
+		}
+	}
+}
+
+import 'cypress-localstorage-commands';

cypress/support/index.js

@@ -0,0 +1,27 @@
+// ***********************************************************
+// This example support/index.js is processed and
+// loaded automatically before your test files.
+//
+// This is a great place to put global configuration and
+// behavior that modifies Cypress.
+//
+// You can change the location of this file or turn off
+// automatically serving support files with the
+// 'supportFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/configuration
+// ***********************************************************
+
+// Import commands.js using ES2015 syntax:
+import './commands';
+
+// Alternatively you can use CommonJS syntax:
+// require('./commands')
+
+Cypress.on('uncaught:exception', (err) => {
+	/* returning false here prevents Cypress from failing the test */
+	if (err.message.includes('ResizeObserver loop limit exceeded')) {
+		return false;
+	}
+});

cypress/tsconfig.json

@@ -0,0 +1,7 @@
+{
+	"compilerOptions": {
+		"allowJs": true,
+		"types": ["cypress", "cypress-localstorage-commands"]
+	},
+	"include": ["**/*.ts"]
+}

docs/global.css

@@ -1,134 +0,0 @@
-@media (prefers-color-scheme: light) {
-	html, body {
-		position: relative;
-		width: 100%;
-		height: 100%;
-	}
-
-	#dgraph-div {
-		display: none;
-	}
-
-	body {
-		color: #333;
-		margin: 0;
-		padding: 8px;
-		box-sizing: border-box;
-		font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
-	}
-
-	a {
-		color: rgb(0,100,200);
-		text-decoration: none;
-	}
-
-	a:hover {
-		text-decoration: underline;
-	}
-
-	a:visited {
-		color: rgb(0,80,160);
-	}
-
-	label {
-		display: block;
-	}
-
-
-
-	input, button, select, textarea {
-		font-family: inherit;
-		font-size: inherit;
-		padding: 0.4em;
-		margin: 0 0 0.5em 0;
-		box-sizing: border-box;
-		border: 1px solid #ccc;
-		border-radius: 2px;
-	}
-
-	input:disabled {
-		color: #ccc;
-	}
-
-	input[type="range"] {
-		height: 0;
-	}
-
-	button {
-		background-color: #f4f4f4;
-		outline: none;
-	}
-
-	button:active {
-		background-color: #ddd;
-	}
-
-	button:focus {
-		border-color: #666;
-	}
-}
-
-	body {
-		background-color: #3f3f3f;
-		color: #c8c8c8;
-		margin: 0;
-		padding: 8px;
-		box-sizing: border-box;
-		font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
-	}}
-@media (prefers-color-scheme: dark) {
-	html, body {
-		position: relative;
-		width: 100%;
-		height: 100%;
-
-
-	a {
-		color: rgb(0,100,200);
-		text-decoration: none;
-	}
-
-	a:hover {
-		text-decoration: underline;
-	}
-
-	a:visited {
-		color: rgb(0,80,160);
-	}
-
-	label {
-		display: block;
-	}
-
-	input, button, select, textarea {
-		font-family: inherit;
-		font-size: inherit;
-		padding: 0.4em;
-		margin: 0 0 0.5em 0;
-		box-sizing: border-box;
-		border: 1px solid #ccc;
-		border-radius: 2px;
-	}
-
-	input:disabled {
-		color: #ccc;
-	}
-
-	input[type="range"] {
-		height: 0;
-	}
-
-	button {
-		background-color: #f4f4f4;
-		outline: none;
-	}
-
-	button:active {
-		background-color: #ddd;
-	}
-
-	button:focus {
-		border-color: #666;
-	}
-}
-

docs/index.html

@@ -1,45 +0,0 @@
-<!doctype html>
-<html>
-<head>
-	<meta charset='utf8'>
-	<meta name='viewport' content='width=device-width'>
-
-	<title>Mermaid live editor</title>
-
-	<link rel='icon' type='image/png' href='favicon.png'>
-	<link rel='stylesheet' href='styles.css'>
-	<link rel='stylesheet' href='bundle.css'>
-	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
-<!-- Google Analytics -->
-<script>
-	(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-	(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-	m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-	})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
-
-	ga('create', 'UA-153180559-1', 'auto');
-	</script>
-	<!-- End Google Analytics -->
-
-	<style>
-		.myInlineDecoration {
-			/* cursor: pointer; */
-			/* text-decoration: underline; */
-			font-weight: bold;
-			font-style: oblique;
-			background: #ffcccc;
-		}
-		#dgraph-div {
-			display: none;
-		}
-</style>
-  <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
-  <title>Online FlowChart &amp; Diagrams Editor - Mermaid Live Editor</title>
-  <meta name="og:image" content="https://mermaid-js.github.io/images/header.png">
-  <link rel="canonical" href="https://mermaid-js.github.io/mermaid-live-editor/">
-  <meta name="description" content="Simplify documentation and avoid heavy tools. Open source Visio Alternative. Commonly used for explaining your code! Mermaid is a simple markdown-like script language for generating charts from text via javascript.">
-  </head>
-<body>
-	<script src='bundle.js'></script>
-</body>
-</html>

docs/styles.css

@@ -1,43 +0,0 @@
-html {
-	padding: 0;
-	width: 100%;
-	height: 100%;
-}
-
-body {
-  padding: 32px;
-	font-family: 'trebuchet ms', verdana, arial;
-	position: relative;
-	width: 100%;
-	height: 100%;
-	box-sizing: border-box;
-	margin: 0;
-}
-
-/* @media (prefers-color-scheme: dark) {
-	body {
-		background-color: #3f3f3f;
-		color: #c8c8c8;
-	}
-	a, label {
-		color: #d8d8d8;
-	}
-} */
-.mermaid {
-  /* font-family: 'trebuchet ms', verdana, arial; */
-}
-.marketing-links {
-  font-size: 16px;
-}
-
-.ant-card {
-  margin-bottom: 16px;
-}
-
-i {
-  font-size: 10px !important;
-}
-
-.mermaidTooltip {
-  position: absolute;
-}

package.json

@@ -1,46 +1,72 @@
 {
-  "name": "mermaid-live-editor",
-  "version": "1.2.0",
-  "license": "MIT",
-  "devDependencies": {
-    "cross-env": "^5.2.0",
-    "css-loader": "^2.1.1",
-    "husky": "^4.3.0",
-    "lint-staged": "^10.5.2",
-    "mini-css-extract-plugin": "^0.6.0",
-    "prettier": "^2.2.1",
-    "prettier-plugin-svelte": "^1.4.1",
-    "serve": "^11.0.0",
-    "style-loader": "^0.23.1",
-    "svelte": "^3.0.0",
-    "svelte-loader": "2.13.3",
-    "svelte-watch-resize": "^1.0.3",
-    "webpack": "^4.30.0",
-    "webpack-cli": "^3.3.0",
-    "webpack-dev-server": "^3.3.1"
-  },
-  "scripts": {
-    "release": "cross-env NODE_ENV=production webpack -p",
-    "build": "cross-env NODE_ENV=production webpack",
-    "dev": "webpack-dev-server --content-base docs",
-    "pretty": "prettier --write ./src/*"
-  },
-  "dependencies": {
-    "mermaid": "8.8.4",
-    "js-base64": "^2.5.1",
-    "json-lint": "^0.1.0",
-    "jsonlint": "^1.6.3",
-    "moment": "^2.24.0",
-    "monaco-editor": "0.18.1",
-    "svelte-routing": "^1.4.0",
-    "svelte-spa-router": "^1.3.0"
-  },
-  "husky": {
-    "hooks": {
-      "pre-commit": "lint-staged"
-    }
-  },
-  "lint-staged": {
-    "*.{ts,svelte,js,css,md}": "prettier --plugin-search-dir=. --write"
-  }
+	"name": "mermaid-live-editor",
+	"version": "2.0.67",
+	"scripts": {
+		"dev": "svelte-kit dev",
+		"build": "svelte-kit build",
+		"preview": "svelte-kit preview",
+		"lint": "prettier --check --plugin-search-dir=. . && eslint --ignore-path .gitignore .",
+		"lint:fix": "prettier --write --plugin-search-dir=. . && eslint --fix --ignore-path .gitignore .",
+		"format": "prettier --write --plugin-search-dir=. .",
+		"pre-commit": "lint-staged",
+		"postinstall": "husky install",
+		"test": "cypress run",
+		"cy": "cypress open"
+	},
+	"devDependencies": {
+		"@cypress/snapshot": "^2.1.7",
+		"@sveltejs/adapter-static": "1.0.0-next.19",
+		"@sveltejs/kit": "1.0.0-next.147",
+		"@types/mermaid": "^8.2.7",
+		"@typescript-eslint/eslint-plugin": "^4.31.1",
+		"@typescript-eslint/parser": "^4.31.1",
+		"autoprefixer": "^10.3.4",
+		"chai": "^4.3.4",
+		"cssnano": "^5.0.8",
+		"cypress": "8.4.0",
+		"cypress-localstorage-commands": "^1.5.0",
+		"eslint": "^7.32.0",
+		"eslint-config-prettier": "^8.1.0",
+		"eslint-plugin-cypress": "^2.12.1",
+		"eslint-plugin-es": "^4.1.0",
+		"eslint-plugin-mocha": "^9.0.0",
+		"eslint-plugin-postcss-modules": "^1.2.1",
+		"eslint-plugin-svelte3": "^3.2.1",
+		"eslint-plugin-tailwindcss": "^1.14.3",
+		"husky": "^7.0.2",
+		"lint-staged": "^11.1.2",
+		"mocha": "^9.1.1",
+		"postcss": "^8.3.6",
+		"postcss-load-config": "^3.1.0",
+		"prettier": "~2.4.1",
+		"prettier-plugin-svelte": "^2.4.0",
+		"svelte": "^3.42.6",
+		"svelte-preprocess": "^4.9.4",
+		"tailwindcss": "^2.2.15",
+		"tslib": "^2.3.1",
+		"typescript": "^4.4.3"
+	},
+	"type": "module",
+	"dependencies": {
+		"@analytics/google-analytics": "^0.5.3",
+		"@macfja/svelte-persistent-store": "^1.2.0",
+		"analytics": "^0.7.14",
+		"daisyui": "^1.14.0",
+		"js-base64": "^3.7.1",
+		"mermaid": "^8.12.1",
+		"moment": "^2.29.1",
+		"monaco-editor": "^0.27.0",
+		"random-word-slugs": "^0.0.5"
+	},
+	"lint-staged": {
+		"*.{ts,svelte,js,css,md,json}": [
+			"prettier --plugin-search-dir=. --write",
+			"eslint --ignore-path .gitignore "
+		]
+	},
+	"volta": {
+		"node": "14.16.1",
+		"yarn": "1.22.10",
+		"npm": "7.11.2"
+	}
 }

postcss.config.cjs

@@ -0,0 +1,23 @@
+const tailwindcss = require('tailwindcss');
+const autoprefixer = require('autoprefixer');
+const cssnano = require('cssnano');
+
+const mode = process.env.NODE_ENV;
+const dev = mode === 'development';
+
+module.exports = {
+	plugins: [
+		// Some plugins, like postcss-nested, need to run before Tailwind
+
+		tailwindcss,
+
+		// But others, like autoprefixer, need to run after
+
+		autoprefixer,
+
+		!dev &&
+			cssnano({
+				preset: 'default'
+			})
+	]
+};

renovate.json

@@ -0,0 +1,28 @@
+{
+	"extends": [
+		"config:base",
+		":rebaseStalePrs",
+		"group:allNonMajor",
+		"schedule:earlyMondays",
+		":automergeMinor",
+		":automergeTesters",
+		":automergeLinters",
+		":automergeTypes",
+		":automergePatch"
+	],
+	"packageRules": [
+		{
+			"matchUpdateTypes": ["minor", "patch", "pin", "digest"],
+			"automerge": true
+		},
+		{
+			"matchDatasources": ["npm"],
+			"stabilityDays": 3
+		}
+	],
+	"dependencyDashboard": true,
+	"major": {
+		"dependencyDashboardApproval": true
+	},
+	"dependencyDashboardAutoclose": true
+}

src/App.svelte

@@ -1,31 +0,0 @@
-<script>
-  import Router from 'svelte-spa-router';
-  // Used for SSR. A falsy value is ignored by the Router.
-  import Edit from './routes/Edit.svelte';
-  import View from './routes/View.svelte';
-
-  const routes = {
-    // Exact path
-    '/': Edit,
-
-    // Using named parameters, with last being optional
-    '/edit/:data': Edit,
-
-    // Wildcard parameter
-    '/view/:data': View,
-
-    // Catch-all
-    // This is optional, but if present it must be the last
-    '*': Edit,
-  };
-</script>
-
-<style>
-</style>
-
-<svelte:head>
-  <link
-    href="https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;0,800;0,900;1,400;1,500;1,600;1,700;1,800;1,900&family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap"
-    rel="stylesheet" />
-</svelte:head>
-<Router {routes} />

src/app.html

@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8" />
+		<meta name="viewport" content="width=device-width, initial-scale=1" />
+		<title>Online FlowChart &amp; Diagrams Editor - Mermaid Live Editor</title>
+		<meta
+			name="og:image"
+			content="https://github.com/mermaid-js/mermaid/raw/develop/img/header.png"
+		/>
+		<link rel="canonical" href="https://mermaid.live" />
+		<meta
+			name="description"
+			content="Simplify documentation and avoid heavy tools. Open source Visio Alternative. Commonly used for explaining your code! Mermaid is a simple markdown-like script language for generating charts from text via javascript."
+		/>
+		<link rel="icon" type="image/png" href="favicon.png" />
+		<link rel="manifest" href="manifest.json" />
+		<link
+			rel="stylesheet"
+			href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.2/css/all.min.css"
+		/>
+		<link
+			rel="stylesheet"
+			href="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.27.0/min/vs/editor/editor.main.min.css"
+			crossorigin="anonymous"
+			referrerpolicy="no-referrer"
+		/>
+		<script>
+			var require = {
+				paths: { vs: 'https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.27.0/min/vs' }
+			};
+		</script>
+		<script
+			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.27.0/min/vs/loader.min.js"
+			crossorigin="anonymous"
+			referrerpolicy="no-referrer"
+		></script>
+		<script
+			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.27.0/min/vs/editor/editor.main.nls.min.js"
+			crossorigin="anonymous"
+			referrerpolicy="no-referrer"
+		></script>
+		<script
+			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.27.0/min/vs/editor/editor.main.js"
+			crossorigin="anonymous"
+			referrerpolicy="no-referrer"
+		></script>
+
+		%svelte.head%
+	</head>
+	<body>
+		<div id="svelte">%svelte.body%</div>
+	</body>
+</html>

src/app.postcss

@@ -0,0 +1,10 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+.input {
+	@apply flex-1 border-primary border-solid border-2 rounded;
+}
+.action-btn {
+	@apply btn btn-primary;
+}

src/code-error-store.js

@@ -1,3 +0,0 @@
-import { writable } from 'svelte/store';
-
-export const codeErrorStore = writable(undefined);

src/code-store.js

@@ -1,55 +0,0 @@
-import { writable, get } from 'svelte/store';
-// import mermaid from '@mermaid-js/mermaid';
-import mermaid from '@mermaid';
-import { Base64 } from 'js-base64';
-import { push, pop, replace } from 'svelte-spa-router';
-
-export const codeStore = writable({});
-export const fromUrl = (data) => {
-  let code;
-  let state;
-  const isDarkMode =
-    window.matchMedia('(prefers-color-scheme: dark)').matches && false;
-  try {
-    let stateStr = Base64.decode(data);
-    console.log('state from url', stateStr);
-    state = JSON.parse(stateStr);
-
-    if (state.code === undefined) {
-      // not valid json
-      //      state = { code: '', mermaid: { theme: themeFromUrl } }
-    }
-    code = state.code;
-  } catch (e) {
-    // console.error('Init error', e);
-    code = `graph TD
-  A[Christmas] -->|Get money| B(Go shopping)
-  B --> C{Let me think}
-  C -->|One| D[Laptop]
-  C -->|Two| E[iPhone]
-  C -->|Three| F[fa:fa-car Car]
-		`;
-    state = { code, mermaid: { theme: isDarkMode ? 'dark' : 'default' } };
-  }
-
-  codeStore.set(state);
-};
-export const updateCodeStore = (newState) => {
-  codeStore.set(newState);
-  replace('/edit/' + Base64.encodeURI(JSON.stringify(newState)));
-};
-export const updateCode = (code, updateEditor) => {
-  const state = get(codeStore);
-  state.code = code;
-  state.updateEditor = updateEditor;
-  codeStore.set(state);
-};
-export const updateConfig = (config) => {
-  const state = get(codeStore);
-  state.mermaid = config;
-  codeStore.set(state);
-};
-
-const unsubscribe = codeStore.subscribe((state) => {
-  replace('/edit/' + Base64.encodeURI(JSON.stringify(state)));
-});

src/components/Card.svelte

@@ -1,36 +0,0 @@
-<script>
-  export let title = '';
-  export let noPadding = false;
-  let contentClass = 'padding';
-  if (noPadding) {
-    contentClass = '';
-  }
-</script>
-
-<style>
-  #card {
-    border: 1px solid lightgray;
-    margin-bottom: 16px;
-  }
-  #title {
-    font-family: 'Playfair Display', serif;
-    font-weight: 400;
-    border-bottom: 1px solid lightgray;
-    font-size: 1.25rem;
-    background-color: #1e60ab;
-    color: #eaebef;
-  }
-  #content {
-    padding-top: 8px;
-  }
-  .padding {
-    padding: 8px;
-  }
-</style>
-
-<div id="card">
-  <div id="title" class="padding">{title}</div>
-  <div id="content" class={contentClass}>
-    <slot />
-  </div>
-</div>

src/components/Config.svelte

@@ -1,114 +0,0 @@
-<script>
-  import {
-    codeStore,
-    updateCodeStore,
-    updateConfig,
-    updateCode,
-  } from '../code-store.js';
-  import { configErrorStore } from '../config-error-store.js';
-  import { onMount } from 'svelte';
-  import { push, pop, replace } from 'svelte-spa-router';
-  import { Base64 } from 'js-base64';
-  // import mermaid from '@mermaid-js/mermaid';
-  import mermaid from '@mermaid';
-  import Error from './Error.svelte';
-  import { getResizeHandler, initEditor } from './editor-utils';
-  import { watchResize } from 'svelte-watch-resize';
-  import 'monaco-editor/esm/vs/editor/browser/controller/coreCommands.js';
-  import 'monaco-editor/esm/vs/editor/contrib/find/findController.js';
-  import * as monaco from 'monaco-editor/esm/vs/editor/editor.api.js';
-
-  export let conf = '';
-  export let code = '';
-  export let error = false;
-
-  let edit;
-  let editorElem = null;
-
-  let decorations = [];
-  const decArr = [];
-  let resizeHandler = () => {};
-
-  let oldConf = {};
-  const handleConfUpdate = (conf) => {
-    try {
-      console.log(conf);
-      JSON.parse(conf);
-      // let newState = { code, mermaid: JSON.parse(conf) };
-      // oldConf = newState.mermaid;
-      updateConfig(JSON.parse(conf));
-      configErrorStore.set(undefined);
-      // const model = edit.getModel();
-      // // model.setValue(conf);
-      // // model.dispose();
-    } catch (e) {
-      console.log('Error in parsed', e);
-      configErrorStore.set(e);
-      const str = JSON.stringify({ code, mermaid: oldConf });
-      replace('/edit/' + Base64.encodeURI(str));
-    }
-  };
-
-  const unsubscribe = codeStore.subscribe((state) => {
-    if (editorElem === null) {
-      console.log('Starting stuff', document.getElementById('editor-conf'));
-      editorElem = document.getElementById('editor-conf');
-    }
-    if (!conf && state) {
-      conf = JSON.stringify(state.mermaid, null, 2);
-    }
-    if (state) {
-      code = state.code;
-    }
-    if (!edit && conf && editorElem !== null) {
-      edit = monaco.editor.create(editorElem, {
-        value: [conf].join('\n'),
-        theme: 'myCoolTheme',
-        language: 'JSON',
-      });
-      resizeHandler = getResizeHandler(edit);
-      let decorations = [];
-      edit.onDidChangeModelContent(function (e) {
-        const conf = edit.getValue();
-        handleConfUpdate(conf);
-      });
-      handleConfUpdate(conf);
-    }
-  });
-
-  initEditor(monaco);
-
-  const unsubscribeError = configErrorStore.subscribe((_error) => {
-    // console.log('Error ideintified' + _error.toString());
-    if (_error) {
-      error = _error.toString();
-    } else {
-      error = false;
-    }
-  });
-
-  onMount(async () => {
-    console.log('Mounting config');
-    self.MonacoEnvironment = {
-      getWorkerUrl: function (moduleId, label) {
-        return './editor.worker.bundle.js';
-      },
-    };
-  });
-</script>
-
-<style>
-  #editor-conf {
-    width: 100%;
-    height: 200px;
-    max-height: 300px;
-    flex: 1;
-  }
-</style>
-
-<div id="editor-container">
-  <div id="editor-conf" use:watchResize={resizeHandler} />
-  {#if error}
-    <Error errorText={error} />
-  {/if}
-</div>

src/components/Editor.svelte

@@ -1,136 +0,0 @@
-<script>
-  import { codeStore, updateCodeStore } from '../code-store.js';
-  import { codeErrorStore } from '../code-error-store.js';
-  import { onMount } from 'svelte';
-  import { push, pop, replace } from 'svelte-spa-router';
-  import { Base64 } from 'js-base64';
-  // import mermaid from '@mermaid-js/mermaid';
-  import mermaid from '@mermaid';
-  import Error from './Error.svelte';
-  import { getResizeHandler, initEditor } from './editor-utils';
-  import 'monaco-editor/esm/vs/editor/browser/controller/coreCommands.js';
-  import 'monaco-editor/esm/vs/editor/contrib/find/findController.js';
-  import * as monaco from 'monaco-editor/esm/vs/editor/editor.api.js';
-  import { watchResize } from 'svelte-watch-resize';
-
-  export let code = '';
-  const isDarkMode =
-    window.matchMedia('(prefers-color-scheme: dark)').matches && false;
-  export let conf = { theme: isDarkMode ? 'dark' : 'default' };
-  let edit;
-  export let error = false;
-
-  let decorations = [];
-  const decArr = [];
-  let editorElem = null;
-  let resizeHandler = () => {};
-  const handleCodeUpdate = (code) => {
-    try {
-      mermaid.parse(code);
-      let newState = { code, mermaid: conf, updateEditor: false };
-      updateCodeStore(newState);
-      decArr.forEach((decor) => {
-        edit.deltaDecorations(decor, []);
-      });
-
-      codeErrorStore.set(undefined);
-      const model = edit.getModel();
-    } catch (e) {
-      if (e) {
-        codeErrorStore.set(e);
-        console.log('Error in parsed', e.hash);
-        const str = JSON.stringify({ code: code, mermaid: conf });
-        replace('/edit/' + Base64.encodeURI(str));
-        const l = e.hash.line;
-        decArr.push(
-          edit.deltaDecorations(
-            [],
-            [
-              {
-                range: new monaco.Range(
-                  e.hash.loc.first_line,
-                  e.hash.loc.last_line,
-                  e.hash.loc.first_column,
-                  e.hash.loc.last_column
-                ),
-                options: { inlineClassName: 'myInlineDecoration' },
-              },
-            ]
-          )
-        );
-      }
-    }
-  };
-
-  const unsubscribe = codeStore.subscribe((state) => {
-    console.log('Code change');
-    if (editorElem === null) {
-      editorElem = document.getElementById('editor');
-    }
-    if (!code && state) {
-      code = state.code;
-    }
-    if (state) {
-      conf = state.mermaid;
-    }
-    if (!edit && code && editorElem !== null) {
-      edit = monaco.editor.create(editorElem, {
-        value: [code].join('\n'),
-        theme: 'myCoolTheme',
-        language: 'mermaid',
-      });
-      resizeHandler = getResizeHandler(edit);
-
-      let decorations = [];
-      edit.onDidChangeModelContent(function (e) {
-        const code = edit.getValue();
-        handleCodeUpdate(code);
-      });
-      handleCodeUpdate(code);
-    }
-    if (state && state.updateEditor && edit && code && editorElem !== null) {
-      edit.setValue(state.code);
-      handleCodeUpdate(state.code);
-    }
-  });
-
-  const unsubscribeError = codeErrorStore.subscribe((_error) => {
-    if (_error) {
-      error = true;
-    } else {
-      error = false;
-    }
-  });
-
-  initEditor(monaco);
-
-  onMount(async () => {
-    // editorElem = document.querySelector('#editor')
-    self.MonacoEnvironment = {
-      getWorkerUrl: function (moduleId, label) {
-        return './editor.worker.bundle.js';
-      },
-    };
-  });
-
-  // export let name;
-  // export let params = {};
-</script>
-
-<style>
-  #editor-container {
-  }
-  #editor {
-    width: 100%;
-    height: 400px;
-    max-height: 300px;
-    flex: 1;
-  }
-</style>
-
-<div id="editor-container">
-  <div id="editor" use:watchResize={resizeHandler} />
-  {#if error}
-    <Error errorText="Syntax Error" />
-  {/if}
-</div>

src/components/Error.svelte

@@ -1,49 +0,0 @@
-<script>
-  import { codeErrorStore } from '../code-error-store.js';
-  import { onMount } from 'svelte';
-
-  onMount(async () => {});
-
-  // export let code = '';
-  export let classes = '';
-
-  // export let error = {};
-  // export let token = '';
-  // export let expected = '';
-
-  // export let params = {}
-  export let errorText = '';
-
-  // const unsubscribeError = codeErrorStore.subscribe( _error => {
-  // 		if(typeof _error === 'undefined') {
-  // 			classes = 'invisible';
-  // 			error = {};
-  // 			token='';
-  // 			expected='';
-  // 		} else {
-  // 			classes = 'visible';
-  // 			error = _error;
-  // 			console.log('error: ',  _error);
-  // 			token = error.hash.token;
-  // 			expected = error.hash.expected.join(' ');;
-  // 		}
-  // 	});
-</script>
-
-<style>
-  #error {
-    background: darkred;
-    color: white;
-    flex: 1;
-    padding: 10px;
-    /* position: absolute; */
-  }
-  .invisible {
-    display: none;
-  }
-  .visible {
-    display: block;
-  }
-</style>
-
-<div id="error" class={classes}>{errorText}</div>

src/components/Links.svelte

@@ -1,228 +0,0 @@
-<script>
-  import { link } from 'svelte-spa-router';
-  import { Base64 } from 'js-base64';
-  import moment from 'moment';
-  import { codeStore } from '../code-store.js';
-
-  const getBase64SVG = () => {
-    const container = document.getElementById('container');
-    const svg = container.innerHTML.replaceAll('<br>', '<br/>');
-    return Base64.encode(svg);
-  };
-
-  const exportImage = (event, exporter) => {
-    const canvas = document.createElement('canvas');
-    const svg = document.querySelector('#container svg');
-    const box = svg.getBoundingClientRect();
-    canvas.width = box.width;
-    canvas.height = box.height;
-    if (imagemodeselected === 'width') {
-      const ratio = box.height / box.width;
-      canvas.width = userimagewidth;
-      canvas.height = userimagewidth * ratio;
-    } else if (imagemodeselected === 'height') {
-      const ratio = box.width / box.height;
-      canvas.width = userimageheight * ratio;
-      canvas.height = userimageheight;
-    }
-    const context = canvas.getContext('2d');
-    context.fillStyle = 'white';
-    context.fillRect(0, 0, canvas.width, canvas.height);
-
-    const image = new Image();
-    image.onload = exporter(canvas, context, image);
-
-    console.log('SVG', getBase64SVG());
-    image.src = `data:image/svg+xml;base64,${getBase64SVG()}`;
-    event.stopPropagation();
-    event.preventDefault();
-  };
-
-  const downloadImage = (canvas, context, image) => {
-    return () => {
-      context.drawImage(image, 0, 0, canvas.width, canvas.height);
-
-      const a = document.createElement('a');
-      a.download = `mermaid-diagram-${moment().format('YYYYMMDDHHmmss')}.png`;
-      a.href = canvas
-        .toDataURL('image/png')
-        .replace('image/png', 'image/octet-stream');
-      a.click();
-    };
-  };
-
-  const clipboardCopy = (canvas, context, image) => {
-    return () => {
-      context.drawImage(image, 0, 0, canvas.width, canvas.height);
-
-      canvas.toBlob((blob) => {
-        try {
-          navigator.clipboard.write([
-            new ClipboardItem({
-              [blob.type]: blob,
-            }),
-          ]);
-        } catch (error) {
-          console.error(error);
-        }
-      });
-    };
-  };
-
-  const onCopyClipboard = (event) => {
-    exportImage(event, clipboardCopy);
-  };
-
-  const onDownloadPNG = (event) => {
-    exportImage(event, downloadImage);
-  };
-
-  const onDownloadSVG = (event) => {
-    console.log('event', event.target);
-    event.target.href = `data:image/svg+xml;base64,${getBase64SVG()}`;
-    event.target.download = `mermaid-diagram-${moment().format(
-      'YYYYMMDDHHmmss'
-    )}.svg`;
-    console.log('event', event);
-  };
-
-  const onCopyMarkdown = (event) => {
-    event.target.select();
-    document.execCommand('Copy');
-  };
-
-  let url = '/mermaid-live-editor/#/view';
-  let b64Code;
-  let iUrl;
-  let svgUrl;
-  let mdCode;
-  let imagemodeselected = 'auto';
-  let userimagewidth = 1920;
-  let userimageheight = 1080;
-
-  const unsubscribe = codeStore.subscribe((state) => {
-    b64Code = Base64.encodeURI(JSON.stringify(state));
-    url = `/mermaid-live-editor/#/view/${b64Code}`;
-    iUrl = `https://mermaid.ink/img/${b64Code}`;
-    svgUrl = `https://mermaid.ink/svg/${b64Code}`;
-    mdCode = `[![](${iUrl})](${window.location.protocol}//${window.location.host}${window.location.pathname}#/edit/${b64Code})`;
-  });
-</script>
-
-<style>
-  #links {
-    margin-bottom: 1rem;
-    padding-bottom: 0.5rem;
-    border-bottom: 1px solid lightgray;
-  }
-  #markdown {
-    padding: 7px;
-    font-family: monospace;
-    font-size: 14px;
-    width: 95%;
-    margin: 1rem 0;
-    border: 1px solid lightgray;
-  }
-  label[for='markdown'] {
-    cursor: pointer;
-    margin: 0 auto;
-  }
-  /*
-    @media (prefers-color-scheme: dark) {
-        label[for="markdown"] {
-            color: #d8d8d8;
-        }
-    } */
-  .button-style {
-    background-color: #a2d9e2;
-    color: #33a2c4;
-    border-radius: 0.25rem;
-    padding: 0.5rem;
-    border: 1px solid #a2d9e2;
-    margin: 0.25rem;
-  }
-  .button-style:hover {
-    background-color: #fff;
-    color: #33a2c4;
-    border: 1px solid #33a2c4;
-  }
-  .button-style:focus {
-    outline: none;
-  }
-  .link-style {
-    text-decoration: none;
-    color: #33a2c4;
-  }
-  #copy-section {
-    padding-top: 1rem;
-    text-align: center;
-  }
-</style>
-
-<div id="links">
-  <button class="button-style">
-    <a class="link-style" href={url} download="" on:click={onCopyClipboard}>
-      Copy Image
-    </a>
-  </button>
-  <button class="button-style">
-    <a class="link-style" href={url} download="" on:click={onDownloadPNG}>
-      Download PNG
-    </a>
-  </button>
-  <button class="button-style">
-    <a class="link-style" href={url} use:link>Link to view</a>
-  </button>
-  <button class="button-style">
-    <a class="link-style" href={url} download="" on:click={onDownloadSVG}>
-      Download SVG
-    </a>
-  </button>
-  <button class="button-style">
-    <a class="link-style" href={iUrl}>Link to Image</a>
-  </button>
-  <button class="button-style">
-    <a class="link-style" href={svgUrl}>Link to SVG</a>
-  </button>
-  (markdown is base64 encoded for these urls)
-</div>
-<div id="copy-section">
-  <label for="markdown" class="button-style">Copy Markdown</label>
-  <br />
-  <input id="markdown" type="text" value={mdCode} on:click={onCopyMarkdown} />
-</div>
-<p>
-  <label>PNG size:</label>
-  <input
-    type="radio"
-    value="auto"
-    id="autosize"
-    bind:group={imagemodeselected} />
-  <label for="autosize">auto</label>
-  <input
-    type="radio"
-    value="width"
-    id="width-active"
-    bind:group={imagemodeselected} />
-  <label for="width">width</label>
-  <input
-    id="width"
-    type="number"
-    min="3"
-    max="10000"
-    bind:value={userimagewidth}
-    disabled={imagemodeselected !== 'width'} />
-  <input
-    type="radio"
-    value="height"
-    id="height-active"
-    bind:group={imagemodeselected} />
-  <label for="height">height</label>
-  <input
-    id="height"
-    type="number"
-    min="3"
-    max="10000"
-    bind:value={userimageheight}
-    disabled={imagemodeselected !== 'height'} /><br />
-</p>

src/components/Tag.svelte

@@ -1,31 +0,0 @@
-<script>
-  export let noPadding = false;
-  let contentClass = 'padding';
-  if (noPadding) {
-    contentClass = '';
-  }
-</script>
-
-<style>
-  #tag {
-    height: auto;
-    margin: 0 8px 0 0;
-    padding: 0 7px;
-    font-size: 12px;
-    line-height: 20px;
-    white-space: nowrap;
-    border: 1px solid #d9d9d9;
-    border-radius: 4px;
-    cursor: default;
-    font-size: smaller;
-    /* padding: 8px; */
-    color: #52c41a;
-    background: #f6ffed;
-    border-color: #b7eb8f;
-    margin-left: 8px;
-  }
-</style>
-
-<div id="tag">
-  <slot />
-</div>

src/components/View.svelte

@@ -1,124 +0,0 @@
-<script>
-  import { codeStore } from '../code-store.js';
-  import { codeErrorStore } from '../code-error-store.js';
-  import { configErrorStore } from '../config-error-store.js';
-  import { onMount } from 'svelte';
-  // import mermaid from '@mermaid-js/mermaid';
-  import mermaid from '@mermaid';
-
-  const detectType = (text) => {
-    text = text.replace(/^\s*%%.*\n/g, '\n');
-    console.debug('Detecting diagram type based on the text ' + text);
-    if (text.match(/^\s*sequenceDiagram/)) {
-      return 'sequence';
-    }
-
-    if (text.match(/^\s*gantt/)) {
-      return 'gantt';
-    }
-
-    if (text.match(/^\s*classDiagram/)) {
-      return 'class';
-    }
-
-    if (text.match(/^\s*stateDiagram/)) {
-      return 'state';
-    }
-
-    if (text.match(/^\s*gitGraph/)) {
-      return 'git';
-    }
-    if (text.match(/^\s*flowchart/)) {
-      return 'flowchart';
-    }
-
-    if (text.match(/^\s*info/)) {
-      return 'info';
-    }
-    if (text.match(/^\s*pie/)) {
-      return 'pie';
-    }
-
-    return 'flowchart';
-  };
-
-  // manual debounce
-  let timeout;
-  const saveStatistcs = (graphType) => {
-    clearTimeout(timeout);
-    // Only save statistcs after a 5 sec delay
-    timeout = setTimeout(function () {
-      console.log('ga:', 'send', 'event', 'render', graphType, graphType);
-      ga('send', 'event', graphType, 'render', 'render');
-    }, 5000);
-  };
-
-  let element;
-  let container;
-  onMount(async () => {
-    element = document.querySelector('graph-div');
-  });
-
-  let insertSvg = function (svgCode, bindFunctions) {
-    // element.innerHTML = svgCode;
-  };
-
-  export let code = '';
-  export let configClasses = '';
-  export let codeClasses = '';
-  const unsubscribe = codeStore.subscribe((state) => {
-    try {
-      if (container && state) {
-        code = state.code;
-
-        // mermaid.parse(code)
-        // Replacing special characters '<' and '>' with encoded '&lt;' and '&gt;'
-        let _code = code;
-        _code = _code.replace(/</g, '&lt;');
-        _code = _code.replace(/>/g, '&gt;');
-
-        container.innerHTML = _code;
-        saveStatistcs(detectType(code));
-        delete container.dataset.processed;
-        mermaid.initialize(Object.assign({}, state.mermaid));
-        mermaid.init(undefined, container);
-        if (code) mermaid.render('graph-div', code, insertSvg);
-      }
-    } catch (e) {
-      console.log('view fail', e);
-    }
-  });
-  const unsubscribeError = codeErrorStore.subscribe((_error) => {
-    if (typeof _error === 'undefined') {
-      codeClasses = '';
-    } else {
-      codeClasses = 'error';
-      console.log('code error: ', _error);
-    }
-  });
-  const unsubscribeConfigError = configErrorStore.subscribe((_error) => {
-    if (typeof _error === 'undefined') {
-      configClasses = '';
-    } else {
-      configClasses = 'error';
-      console.log('conf error: ', _error);
-    }
-  });
-</script>
-
-<style>
-  #view {
-    border: 1px solor darkred;
-    flex: 1;
-  }
-  #container {
-    overflow-x: auto;
-  }
-  .error {
-    opacity: 0.5;
-  }
-</style>
-
-<div id="view" class="{codeClasses} {configClasses}">
-  <div id="container" bind:this={container} />
-</div>

src/components/editor-utils.js

@@ -1,86 +0,0 @@
-export const initEditor = (monaco) => {
-  monaco.languages.register({ id: 'mermaid' });
-
-  // Register a tokens provider for the language
-  monaco.languages.setMonarchTokensProvider('mermaid', {
-    typeKeywords: [
-      'graph',
-      'stateDiagram',
-      'sequenceDiagram',
-      'classDiagram',
-      'pie',
-      'flowchart',
-      'gantt',
-    ],
-    keywords: ['patricipant', 'as'],
-    arrows: ['---', '===', '-->', '==>'],
-
-    tokenizer: {
-      root: [
-        [/[{}]/, 'delimiter.bracket'],
-        [
-          /[a-z_$][\w$]*/,
-          { cases: { '@typeKeywords': 'keyword', '@keywords': 'keyword' } },
-        ],
-        [/[-=>ox]+/, { cases: { '@arrows': 'transition' } }],
-        [/[\[\{\(}]+.+?[\)\]\}]+/, 'string'],
-        [/\".*\"/, 'string'],
-      ],
-    },
-    whitespace: [
-      [/[ \t\r\n]+/, 'white'],
-      [/\%\%.*$/, 'comment'],
-    ],
-  });
-
-  monaco.editor.defineTheme('myCoolTheme', {
-    base: 'vs',
-    inherit: false,
-    rules: [
-      { token: 'keyword', foreground: '880000', fontStyle: 'bold' },
-      { token: 'custom-error', foreground: 'ff0000', fontStyle: 'bold' },
-      { token: 'string', foreground: 'AA8500' },
-      { token: 'transition', foreground: '008800', fontStyle: 'bold' },
-      { token: 'delimiter.bracket', foreground: '000000', fontStyle: 'bold' },
-    ],
-  });
-
-  // Register a completion item provider for the new language
-  monaco.languages.registerCompletionItemProvider('mermaid', {
-    provideCompletionItems: () => {
-      var suggestions = [
-        {
-          label: 'simpleText',
-          kind: monaco.languages.CompletionItemKind.Text,
-          insertText: 'simpleText',
-        },
-        {
-          label: 'testing',
-          kind: monaco.languages.CompletionItemKind.Keyword,
-          insertText: 'testing(${1:condition})',
-          insertTextRules:
-            monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
-        },
-        {
-          label: 'ifelse',
-          kind: monaco.languages.CompletionItemKind.Snippet,
-          insertText: [
-            'if (${1:condition}) {',
-            '\t$0',
-            '} else {',
-            '\t',
-            '}',
-          ].join('\n'),
-          insertTextRules:
-            monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
-          documentation: 'If-Else Statement',
-        },
-      ];
-      return { suggestions: suggestions };
-    },
-  });
-};
-
-export const getResizeHandler = (editor) => {
-  return (node) => editor && editor.layout();
-};

src/config-error-store.js

@@ -1,3 +0,0 @@
-import { writable } from 'svelte/store';
-
-export const configErrorStore = writable(undefined);

src/editor.js

@@ -1,168 +0,0 @@
-// (1) Desired editor features:
-import 'monaco-editor/esm/vs/editor/browser/controller/coreCommands.js';
-// import 'monaco-editor/esm/vs/editor/browser/widget/codeEditorWidget.js';
-// import 'monaco-editor/esm/vs/editor/browser/widget/diffEditorWidget.js';
-// import 'monaco-editor/esm/vs/editor/browser/widget/diffNavigator.js';
-// import 'monaco-editor/esm/vs/editor/contrib/bracketMatching/bracketMatching.js';
-// import 'monaco-editor/esm/vs/editor/contrib/caretOperations/caretOperations.js';
-// import 'monaco-editor/esm/vs/editor/contrib/caretOperations/transpose.js';
-// import 'monaco-editor/esm/vs/editor/contrib/clipboard/clipboard.js';
-// import 'monaco-editor/esm/vs/editor/contrib/codelens/codelensController.js';
-// import 'monaco-editor/esm/vs/editor/contrib/colorPicker/colorDetector.js';
-// import 'monaco-editor/esm/vs/editor/contrib/comment/comment.js';
-// import 'monaco-editor/esm/vs/editor/contrib/contextmenu/contextmenu.js';
-// import 'monaco-editor/esm/vs/editor/contrib/cursorUndo/cursorUndo.js';
-// import 'monaco-editor/esm/vs/editor/contrib/dnd/dnd.js';
-import 'monaco-editor/esm/vs/editor/contrib/find/findController.js';
-// import 'monaco-editor/esm/vs/editor/contrib/folding/folding.js';
-// import 'monaco-editor/esm/vs/editor/contrib/format/formatActions.js';
-// import 'monaco-editor/esm/vs/editor/contrib/goToDeclaration/goToDeclarationCommands.js';
-// import 'monaco-editor/esm/vs/editor/contrib/goToDeclaration/goToDeclarationMouse.js';
-// import 'monaco-editor/esm/vs/editor/contrib/gotoError/gotoError.js';
-// import 'monaco-editor/esm/vs/editor/contrib/hover/hover.js';
-// import 'monaco-editor/esm/vs/editor/contrib/inPlaceReplace/inPlaceReplace.js';
-// import 'monaco-editor/esm/vs/editor/contrib/linesOperations/linesOperations.js';
-// import 'monaco-editor/esm/vs/editor/contrib/links/links.js';
-// import 'monaco-editor/esm/vs/editor/contrib/multicursor/multicursor.js';
-// import 'monaco-editor/esm/vs/editor/contrib/parameterHints/parameterHints.js';
-// import 'monaco-editor/esm/vs/editor/contrib/quickFix/quickFixCommands.js';
-// import 'monaco-editor/esm/vs/editor/contrib/referenceSearch/referenceSearch.js';
-// import 'monaco-editor/esm/vs/editor/contrib/rename/rename.js';
-// import 'monaco-editor/esm/vs/editor/contrib/smartSelect/smartSelect.js';
-// import 'monaco-editor/esm/vs/editor/contrib/snippet/snippetController2.js';
-// import 'monaco-editor/esm/vs/editor/contrib/suggest/suggestController.js';
-// import 'monaco-editor/esm/vs/editor/contrib/toggleTabFocusMode/toggleTabFocusMode.js';
-// import 'monaco-editor/esm/vs/editor/contrib/wordHighlighter/wordHighlighter.js';
-// import 'monaco-editor/esm/vs/editor/contrib/wordOperations/wordOperations.js';
-// import 'monaco-editor/esm/vs/editor/standalone/browser/accessibilityHelp/accessibilityHelp.js';
-// import 'monaco-editor/esm/vs/editor/standalone/browser/inspectTokens/inspectTokens.js';
-// import 'monaco-editor/esm/vs/editor/standalone/browser/iPadShowKeyboard/iPadShowKeyboard.js';
-// import 'monaco-editor/esm/vs/editor/standalone/browser/quickOpen/quickOutline.js';
-// import 'monaco-editor/esm/vs/editor/standalone/browser/quickOpen/gotoLine.js';
-// import 'monaco-editor/esm/vs/editor/standalone/browser/quickOpen/quickCommand.js';
-// import 'monaco-editor/esm/vs/editor/standalone/browser/toggleHighContrast/toggleHighContrast.js';
-import * as monaco from 'monaco-editor/esm/vs/editor/editor.api.js';
-
-// (2) Desired languages:
-// import 'monaco-editor/esm/vs/language/typescript/monaco.contribution';
-// import 'monaco-editor/esm/vs/language/css/monaco.contribution';
-// import 'monaco-editor/esm/vs/language/json/monaco.contribution';
-// import 'monaco-editor/esm/vs/language/html/monaco.contribution';
-// import 'monaco-editor/esm/vs/basic-languages/bat/bat.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/coffee/coffee.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/cpp/cpp.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/csharp/csharp.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/csp/csp.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/css/css.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/dockerfile/dockerfile.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/fsharp/fsharp.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/go/go.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/handlebars/handlebars.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/html/html.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/ini/ini.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/java/java.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/less/less.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/lua/lua.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/markdown/markdown.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/msdax/msdax.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/mysql/mysql.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/objective-c/objective-c.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/pgsql/pgsql.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/php/php.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/postiats/postiats.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/powershell/powershell.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/pug/pug.contribution.js';
-import 'monaco-editor/esm/vs/basic-languages/python/python.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/r/r.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/razor/razor.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/redis/redis.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/redshift/redshift.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/ruby/ruby.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/sb/sb.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/scss/scss.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/solidity/solidity.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/sql/sql.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/swift/swift.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/vb/vb.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/xml/xml.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/yaml/yaml.contribution.js';
-// import 'monaco-editor/esm/vs/basic-languages/javascript/javascript.contribution';
-// import 'monaco-editor/esm/vs/basic-languages/typescript/typescript.contribution';
-
-monaco.languages.register({ id: 'mermaid' });
-
-// Register a tokens provider for the language
-monaco.languages.setMonarchTokensProvider('mermaid', {
-  tokenizer: {
-    root: [
-      [/\[graph.*/, 'custom-error'],
-      [/\[notice.*/, 'custom-notice'],
-      [/\[info.*/, 'custom-info'],
-      [/\[[a-zA-Z 0-9:]+\]/, 'custom-date'],
-    ],
-  },
-});
-
-self.MonacoEnvironment = {
-  getWorkerUrl: function (moduleId, label) {
-    return './editor.worker.bundle.js';
-  },
-};
-
-// Define a new theme that contains only rules that match this language
-monaco.editor.defineTheme('myCoolTheme', {
-  base: 'vs',
-  inherit: false,
-  rules: [
-    { token: 'custom-info', foreground: '808080' },
-    { token: 'custom-error', foreground: 'ff0000', fontStyle: 'bold' },
-    { token: 'custom-notice', foreground: 'FFA500' },
-    { token: 'custom-date', foreground: '008800' },
-  ],
-});
-
-// Register a completion item provider for the new language
-monaco.languages.registerCompletionItemProvider('mySpecialLanguage', {
-  provideCompletionItems: () => {
-    var suggestions = [
-      {
-        label: 'simpleText',
-        kind: monaco.languages.CompletionItemKind.Text,
-        insertText: 'simpleText',
-      },
-      {
-        label: 'testing',
-        kind: monaco.languages.CompletionItemKind.Keyword,
-        insertText: 'testing(${1:condition})',
-        insertTextRules:
-          monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
-      },
-      {
-        label: 'ifelse',
-        kind: monaco.languages.CompletionItemKind.Snippet,
-        insertText: [
-          'if (${1:condition}) {',
-          '\t$0',
-          '} else {',
-          '\t',
-          '}',
-        ].join('\n'),
-        insertTextRules:
-          monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
-        documentation: 'If-Else Statement',
-      },
-    ];
-    return { suggestions: suggestions };
-  },
-});
-
-const edit = monaco.editor.create(document.getElementById('editor'), {
-  value: [code].join('\n'),
-  theme: 'myCoolTheme',
-  // value: getCode(),
-  //language: 'mySpecialLanguage'
-  language: 'mermaid',
-});
-edit.onDidChangeModelContent(function (e) {
-  codeStore.set(edit.getValue());
-});

src/global.d.ts

@@ -0,0 +1 @@
+/// <reference types="@sveltejs/kit" />

src/lib/components/actions.svelte

@@ -0,0 +1,225 @@
+<script lang="ts">
+	import { browser } from '$app/env';
+
+	import Card from '$lib/components/card/card.svelte';
+	import type { State } from '$lib/types';
+	import { codeStore } from '$lib/util/state';
+	import { toBase64 } from 'js-base64';
+	import moment from 'moment';
+
+	type Exporter = (context: CanvasRenderingContext2D, image: HTMLImageElement) => () => void;
+
+	const getBase64SVG = (svg?: HTMLElement, width?: number, height?: number): string => {
+		svg?.setAttribute('height', `${height}px`);
+		svg?.setAttribute('width', `${width}px`); // Workaround https://stackoverflow.com/questions/28690643/firefox-error-rendering-an-svg-image-to-html5-canvas-with-drawimage
+		if (!svg) {
+			svg = document.querySelector('#container svg');
+		}
+		const svgString = svg.outerHTML
+			.replaceAll('<br>', '<br/>')
+			.replaceAll(/<img([^>]*)>/g, (m, g) => `<img ${g} />`);
+		return toBase64(svgString);
+	};
+
+	const exportImage = (event: Event, exporter: Exporter) => {
+		const canvas: HTMLCanvasElement = document.createElement('canvas');
+		const svg: HTMLElement = document.querySelector('#container svg');
+		const box: DOMRect = svg.getBoundingClientRect();
+		canvas.width = box.width;
+		canvas.height = box.height;
+		if (imagemodeselected === 'width') {
+			const ratio = box.height / box.width;
+			canvas.width = userimagesize;
+			canvas.height = userimagesize * ratio;
+		} else if (imagemodeselected === 'height') {
+			const ratio = box.width / box.height;
+			canvas.width = userimagesize * ratio;
+			canvas.height = userimagesize;
+		}
+
+		const context = canvas.getContext('2d');
+		context.fillStyle = 'white';
+		context.fillRect(0, 0, canvas.width, canvas.height);
+
+		const image = new Image();
+		image.onload = exporter(context, image);
+		image.src = `data:image/svg+xml;base64,${getBase64SVG(svg, canvas.width, canvas.height)}`;
+
+		event.stopPropagation();
+		event.preventDefault();
+	};
+
+	const simulateDownload = (download: string, href: string): void => {
+		const a = document.createElement('a');
+		a.download = download;
+		a.href = href;
+		a.click();
+		a.remove();
+	};
+	const downloadImage: Exporter = (context, image) => {
+		return () => {
+			const { canvas } = context;
+			context.drawImage(image, 0, 0, canvas.width, canvas.height);
+			simulateDownload(
+				`mermaid-diagram-${moment().format('YYYYMMDDHHmmss')}.png`,
+				canvas.toDataURL('image/png').replace('image/png', 'image/octet-stream')
+			);
+		};
+	};
+
+	const isClipboardAvailable = (): boolean => {
+		return Object.prototype.hasOwnProperty.call(window, 'ClipboardItem') as boolean;
+	};
+
+	const clipboardCopy: Exporter = (context, image) => {
+		return () => {
+			const { canvas } = context;
+			context.drawImage(image, 0, 0, canvas.width, canvas.height);
+			canvas.toBlob((blob) => {
+				try {
+					// @ts-ignore: https://github.com/microsoft/TypeScript-DOM-lib-generator/pull/1004/files
+					navigator.clipboard.write([
+						/* eslint-disable no-undef */
+						// @ts-ignore: https://github.com/microsoft/TypeScript/issues/43821
+						new ClipboardItem({
+							[blob.type]: blob
+						})
+					]);
+				} catch (error) {
+					console.error(error);
+				}
+			});
+		};
+	};
+
+	const onCopyClipboard = (event: Event) => {
+		exportImage(event, clipboardCopy);
+	};
+
+	const onDownloadPNG = (event: Event) => {
+		exportImage(event, downloadImage);
+	};
+
+	const onDownloadSVG = () => {
+		simulateDownload(
+			`mermaid-diagram-${moment().format('YYYYMMDDHHmmss')}.svg`,
+			`data:image/svg+xml;base64,${getBase64SVG()}`
+		);
+	};
+
+	const onCopyMarkdown = () => {
+		document.getElementById('markdown').select();
+		document.execCommand('Copy');
+	};
+
+	let gistURL = '';
+	codeStore.subscribe((state) => {
+		if (state.loader?.type === 'gist') {
+			// @ts-ignore Gist will have url
+			gistURL = state.loader.config.url;
+		}
+	});
+
+	const loadGist = () => {
+		if (!gistURL) {
+			alert('Please enter a Gist URL first');
+		}
+		window.location.href = `${window.location.pathname}?gist=${gistURL}`;
+	};
+
+	let iUrl: string;
+	let svgUrl: string;
+	let mdCode: string;
+	let imagemodeselected = 'auto';
+	let userimagesize = 1080;
+
+	let isNetlify = false;
+	if (browser && ['mermaid.live', 'netlify'].some((path) => window.location.host.includes(path))) {
+		isNetlify = true;
+	}
+	codeStore.subscribe((state: State) => {
+		const stateCopy = JSON.parse(JSON.stringify(state));
+		if (typeof stateCopy.mermaid === 'string') {
+			stateCopy.mermaid = JSON.parse(stateCopy.mermaid);
+		}
+		const b64Code = toBase64(JSON.stringify(stateCopy), true);
+		iUrl = `https://mermaid.ink/img/${b64Code}`;
+		svgUrl = `https://mermaid.ink/svg/${b64Code}`;
+		mdCode = `[![](${iUrl})](${window.location.protocol}//${window.location.host}${window.location.pathname}#${window.location.hash})`;
+	});
+</script>
+
+<Card title="Actions" isOpen={true}>
+	<div class="flex flex-wrap gap-2 m-2">
+		{#if isClipboardAvailable()}
+			<button class="action-btn w-full" on:click={onCopyClipboard}
+				><i class="far fa-copy mr-2" /> Copy Image to clipboard
+			</button>
+		{/if}
+		<button class="action-btn flex-auto" on:click={onDownloadPNG}>
+			<i class="fas fa-download mr-2" /> PNG
+		</button>
+		<button class="action-btn flex-auto" on:click={onDownloadSVG}>
+			<i class="fas fa-download mr-2" /> SVG
+		</button>
+		<button class="action-btn flex-auto">
+			<a target="_blank" href={iUrl}><i class="fas fa-external-link-alt mr-2" /> PNG</a>
+		</button>
+		<button class="action-btn flex-auto">
+			<a target="_blank" href={svgUrl}><i class="fas fa-external-link-alt mr-2" /> SVG</a>
+		</button>
+
+		<div class="flex gap-2 items-center">
+			PNG size
+			<label for="autosize">
+				<input type="radio" value="auto" id="autosize" bind:group={imagemodeselected} /> Auto
+			</label>
+
+			<label for="width">
+				<input type="radio" value="width" id="width" bind:group={imagemodeselected} /> Width
+			</label>
+
+			<label for="height">
+				<input type="radio" value="height" id="height" bind:group={imagemodeselected} /> Height
+			</label>
+
+			{#if imagemodeselected !== 'auto'}
+				<input
+					id="height"
+					class="input"
+					type="number"
+					min="3"
+					max="10000"
+					bind:value={userimagesize} />
+			{/if}
+		</div>
+
+		<div class="w-full flex gap-2 items-center">
+			<input class="input" id="markdown" type="text" value={mdCode} on:click={onCopyMarkdown} />
+			<label for="markdown">
+				<button class="btn btn-primary btn-md flex-auto" on:click={onCopyMarkdown}>
+					Copy Markdown
+				</button>
+			</label>
+		</div>
+
+		<div class="w-full flex gap-2 items-center">
+			<input
+				class="input"
+				id="gist"
+				type="text"
+				bind:value={gistURL}
+				placeholder="Enter Gist URL" />
+			<label for="gist">
+				<button class="btn btn-primary btn-md flex-auto" on:click={loadGist}> Load Gist </button>
+			</label>
+		</div>
+		{#if isNetlify}
+			<div class="w-full flex items-center justify-center">
+				<a class="link underline text-gray-500 text-sm" href="https://netlify.com">
+					This site is powered by Netlify
+				</a>
+			</div>
+		{/if}
+	</div>
+</Card>

src/lib/components/card/card.svelte

@@ -0,0 +1,29 @@
+<script lang="ts">
+	import type { Tab } from '$lib/types';
+	import { slide } from 'svelte/transition';
+	import Tabs from './tabs.svelte';
+	export let isCloseable = true;
+	export let isOpen = true;
+	export let tabs: Tab[] = [];
+	export let title: string;
+	$: isOpen = isCloseable ? isOpen : true;
+	$: isTabsShown = isOpen && tabs.length > 0;
+</script>
+
+<div class="card rounded overflow-hidden m-2 flex-grow flex flex-col shadow-2xl">
+	<div
+		class="bg-primary p-2 {isTabsShown ? 'pb-0' : ''} flex-none cursor-pointer"
+		on:click={() => (isOpen = !isOpen)}>
+		<div class="flex justify-between">
+			<Tabs on:select {tabs} bind:isOpen {title} {isCloseable} />
+			<div class="flex gap-x-4 items-center {isTabsShown ? '-mt-2' : ''}">
+				<slot name="actions" />
+			</div>
+		</div>
+	</div>
+	{#if isOpen}
+		<div class="card-body p-0 flex-grow overflow-auto text-base-content" transition:slide>
+			<slot />
+		</div>
+	{/if}
+</div>

src/lib/components/card/tabs.svelte

@@ -0,0 +1,46 @@
+<script lang="ts">
+	import type { Tab, TabEvents } from '$lib/types';
+	import { createEventDispatcher } from 'svelte';
+	import { fade } from 'svelte/transition';
+	export let isCloseable = true;
+	export let tabs: Tab[] = [];
+	export let title: string;
+	export let isOpen = false;
+
+	$: activeTabID = tabs[0]?.id;
+
+	const dispatch = createEventDispatcher<TabEvents>();
+	const toggleTabs = (tab: Tab) => {
+		activeTabID = tab.id;
+		dispatch('select', tab);
+	};
+</script>
+
+<div class="flex cursor-default">
+	<span class="mr-2 font-semibold" on:click|stopPropagation={() => (isOpen = !isOpen)}>
+		{#if isCloseable}
+			<i class="fas fa-chevron-right icon" class:isOpen />
+		{/if}
+		{title}</span>
+	{#if isOpen && tabs}
+		<ul class="tabs" transition:fade>
+			{#each tabs as tab}
+				<div
+					class="tab tab-lifted text-primary-content {activeTabID === tab.id ? 'tab-active' : ''}"
+					on:click|stopPropagation={() => toggleTabs(tab)}>
+					<i class="mr-1 {tab.icon}" />
+					{tab.title}
+				</div>
+			{/each}
+		</ul>
+	{/if}
+</div>
+
+<style>
+	.icon {
+		transition-duration: 0.5s;
+	}
+	.isOpen {
+		transform: rotate(90deg);
+	}
+</style>

src/lib/components/editor/editor.svelte

@@ -0,0 +1,85 @@
+<script lang="ts">
+	import type { EditorEvents } from '$lib/types';
+	import { codeStore } from '$lib/util/state';
+	import { themeStore } from '$lib/util/theme';
+	import type monaco from 'monaco-editor';
+	import { createEventDispatcher, onMount } from 'svelte';
+	import { initEditor } from './util';
+
+	let divEl: HTMLDivElement = null;
+	let editor: monaco.editor.IStandaloneCodeEditor;
+	let Monaco;
+
+	export let text: string;
+	export let language: string;
+	export let editorOptions: monaco.editor.IStandaloneEditorConstructionOptions = {
+		value: text,
+		language: language,
+		minimap: {
+			enabled: false
+		},
+		theme: 'mermaid',
+		overviewRulerLanes: 0
+	};
+	export let errorMarkers: monaco.editor.IMarkerData[] = [];
+	let oldText = text;
+	$: editor && Monaco?.editor.setModelLanguage(editor.getModel(), language);
+	$: {
+		if (text !== oldText) {
+			if ($codeStore.updateEditor) {
+				editor?.setValue(text);
+			}
+			oldText = text;
+		}
+		editor && Monaco?.editor.setModelMarkers(editor.getModel(), 'test', errorMarkers);
+	}
+
+	themeStore.subscribe(({ isDark }) => {
+		editor && Monaco?.editor.setTheme(isDark ? 'mermaid-dark' : 'mermaid');
+	});
+
+	const dispatch = createEventDispatcher<EditorEvents>();
+	const loadMonaco = async () => {
+		let i = 0;
+		while (i++ < 10) {
+			try {
+				// @ts-ignore : This is a hack to handle a svelte-kit error when importing monaco.
+				Monaco = monaco;
+				return;
+			} catch {
+				await new Promise((r) => setTimeout(r, 500));
+			}
+		}
+		alert('Loading Monaco Editor failed. Please try refreshing the page.');
+	};
+	onMount(async () => {
+		try {
+			// @ts-ignore : This is a hack to handle a svelte-kit error when importing monaco.
+			Monaco = monaco;
+		} catch {
+			await loadMonaco(); // Fix https://github.com/mermaid-js/mermaid-live-editor/issues/175
+		}
+		initEditor(Monaco);
+		editor = Monaco.editor.create(divEl, editorOptions);
+		editor.onDidChangeModelContent(() => {
+			text = editor.getValue();
+			dispatch('update', {
+				text
+			});
+		});
+		Monaco?.editor.setTheme($themeStore.isDark ? 'mermaid-dark' : 'mermaid');
+		const resizeObserver = new ResizeObserver((entries) => {
+			editor.layout({
+				height: entries[0].contentRect.height,
+				width: entries[0].contentRect.width
+			});
+		});
+
+		resizeObserver.observe(divEl.parentElement);
+		return () => {
+			editor.dispose();
+		};
+	});
+</script>
+
+<div bind:this={divEl} id="editor" class="overflow-hidden" />

src/lib/components/editor/util.ts

@@ -0,0 +1,549 @@
+/* eslint-disable @typescript-eslint/no-unsafe-assignment */
+/* eslint-disable @typescript-eslint/no-unsafe-call */
+/* eslint-disable @typescript-eslint/no-unsafe-member-access */
+// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
+export const initEditor = (monacoEditor): void => {
+	monacoEditor.languages.register({ id: 'mermaid' });
+
+	const requirementDiagrams = [
+		'requirement',
+		'functionalRequirement',
+		'interfaceRequirement',
+		'performanceRequirement',
+		'physicalRequirement',
+		'designConstraint'
+	];
+
+	const keywords: {
+		[key: string]: {
+			typeKeywords: string[];
+			blockKeywords: string[];
+			keywords: string[];
+		};
+	} = {
+		flowchart: {
+			typeKeywords: ['flowchart', 'flowchart-v2', 'graph'],
+			blockKeywords: ['subgraph', 'end'],
+			keywords: [
+				'TB',
+				'TD',
+				'BT',
+				'RL',
+				'LR',
+				'click',
+				'call',
+				'href',
+				'_self',
+				'_blank',
+				'_parent',
+				'_top',
+				'linkStyle',
+				'style',
+				'classDef',
+				'class',
+				'direction',
+				'interpolate'
+			]
+		},
+		sequenceDiagram: {
+			typeKeywords: ['sequenceDiagram'],
+			blockKeywords: ['alt', 'par', 'and', 'loop', 'else', 'end', 'rect', 'opt', 'alt', 'rect'],
+			keywords: [
+				'participant',
+				'as',
+				'Note',
+				'note',
+				'right of',
+				'left of',
+				'over',
+				'activate',
+				'deactivate',
+				'autonumber',
+				'title'
+			]
+		},
+		classDiagram: {
+			typeKeywords: ['classDiagram', 'classDiagram-v2'],
+			blockKeywords: ['class'],
+			keywords: [
+				'link',
+				'click',
+				'callback',
+				'call',
+				'href',
+				'cssClass',
+				'direction',
+				'TB',
+				'BT',
+				'RL',
+				'LR'
+			]
+		},
+		stateDiagram: {
+			typeKeywords: ['stateDiagram', 'stateDiagram-v2'],
+			blockKeywords: ['state', 'note', 'end'],
+			keywords: ['state', 'as', 'hide empty description', 'direction', 'TB', 'BT', 'RL', 'LR']
+		},
+		erDiagram: {
+			typeKeywords: ['erDiagram'],
+			blockKeywords: [],
+			keywords: []
+		},
+		journey: {
+			typeKeywords: ['journey'],
+			blockKeywords: ['section'],
+			keywords: ['title']
+		},
+		info: {
+			typeKeywords: ['info'],
+			blockKeywords: [],
+			keywords: ['showInfo']
+		},
+		gantt: {
+			typeKeywords: ['gantt'],
+			blockKeywords: [],
+			keywords: [
+				'title',
+				'dateFormat',
+				'axisFormat',
+				'todayMarker',
+				'section',
+				'excludes',
+				'inclusiveEndDates'
+			]
+		},
+		requirementDiagram: {
+			typeKeywords: ['requirement', 'requirementDiagram'],
+			blockKeywords: requirementDiagrams.concat('element'),
+			keywords: []
+		},
+		gitGraph: {
+			typeKeywords: ['gitGraph'],
+			blockKeywords: [],
+			keywords: ['commit', 'branch', 'merge', 'reset', 'checkout', 'LR', 'BT']
+		},
+		pie: {
+			typeKeywords: ['pie'],
+			blockKeywords: [],
+			keywords: ['title', 'showData']
+		}
+	};
+
+	// Register a tokens provider for the mermaid language
+	monacoEditor.languages.setMonarchTokensProvider('mermaid', {
+		...Object.entries(keywords)
+			.map((entry) =>
+				Object.fromEntries(
+					Object.entries(entry[1]).map((deepEntry) => [
+						entry[0] + deepEntry[0][0].toUpperCase() + deepEntry[0].slice(1),
+						deepEntry[1]
+					])
+				)
+			)
+			.reduce((overallKeywords, nextKeyword) => ({ ...overallKeywords, ...nextKeyword }), {}),
+		tokenizer: {
+			root: [
+				[/%%(?=.*%%$)/, { token: 'string', nextEmbedded: 'json' }],
+				[/%%$/, { token: 'string', nextEmbedded: '@pop' }],
+				[/^\s*gitGraph/m, 'typeKeyword', 'gitGraph'],
+				[/^\s*info/m, 'typeKeyword', 'info'],
+				[/^\s*pie/m, 'typeKeyword', 'pie'],
+				[/^\s*(flowchart|flowchart-v2|graph)/m, 'typeKeyword', 'flowchart'],
+				[/^\s*sequenceDiagram/, 'typeKeyword', 'sequenceDiagram'],
+				[/^\s*classDiagram(-v2)?/, 'typeKeyword', 'classDiagram'],
+				[/^\s*journey/, 'typeKeyword', 'journey'],
+				[/^\s*gantt/, 'typeKeyword', 'gantt'],
+				[/^\s*stateDiagram(-v2)?/, 'typeKeyword', 'stateDiagram'],
+				[/^\s*erDiagram/, 'typeKeyword', 'erDiagram'],
+				[/^\s*requirement(Diagram)?/, 'typeKeyword', 'requirementDiagram'],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment']
+			],
+			gitGraph: [
+				[/option(?=s)/, { token: 'typeKeyword', next: 'optionsGitGraph' }],
+				[/(^\s*branch|reset|merge|checkout)(.*$)/, ['keyword', 'variable']],
+				[
+					/[a-zA-Z][\w$]*/,
+					{
+						cases: {
+							'@gitGraphBlockKeywords': 'typeKeyword',
+							'@gitGraphKeywords': 'keyword'
+						}
+					}
+				],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment'],
+				[/".*?"/, 'string'],
+				[/\^/, 'delimiter.bracket']
+			],
+			optionsGitGraph: [
+				[/s$/, { token: 'typeKeyword', nextEmbedded: 'json', matchOnlyAtLineStart: false }],
+				['end', { token: 'typeKeyword', next: '@pop', nextEmbedded: '@pop' }]
+			],
+			info: [
+				[
+					/[a-zA-Z][\w$]*/,
+					{
+						cases: {
+							'@infoBlockKeywords': 'typeKeyword',
+							'@infoKeywords': 'keyword'
+						}
+					}
+				]
+			],
+			pie: [
+				[/(title)(.*$)/, ['keyword', 'string']],
+				[
+					/[a-zA-Z][\w$]*/,
+					{
+						cases: {
+							'@pieBlockKeywords': 'typeKeyword',
+							'@pieKeywords': 'keyword'
+						}
+					}
+				],
+				[/".*?"/, 'string'],
+				[/\s*\d+/, 'number'],
+				[/:/, 'delimiter.bracket'],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment']
+			],
+			flowchart: [
+				[/[ox]?(--+|==+)[ox]/, 'transition'],
+				[
+					/[a-zA-Z][\w$]*/,
+					{
+						cases: {
+							'@flowchartBlockKeywords': 'typeKeyword',
+							'@flowchartKeywords': 'keyword',
+							'@default': 'variable'
+						}
+					}
+				],
+				[/\|+.+?\|+/, 'string'],
+				[/\[+(\\.+?[\\/]|\/.+?[/\\])\]+/, 'string'],
+				[/[[>]+[^\]|[]+?\]+/, 'string'],
+				[/{+.+?}+/, 'string'],
+				[/\(+.+?\)+/, 'string'],
+				[/-\.+->?/, 'transition'],
+				[/(-[-.])([^->]+?)(-{3,}|-{2,}>|\.-+>)/, ['transition', 'string', 'transition']],
+				[/(==+)([^=]+?)(={3,}|={2,}>)/, ['transition', 'string', 'transition']],
+				[/<?(--+|==+)>|===+|---+/, 'transition'],
+				[/:::/, 'transition'],
+				[/[;&]/, 'delimiter.bracket'],
+				[/".*?"/, 'string'],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment']
+			],
+			sequenceDiagram: [
+				[
+					/[a-zA-Z][\w$]*/,
+					{
+						cases: {
+							'@sequenceDiagramBlockKeywords': 'typeKeyword',
+							'@sequenceDiagramKeywords': 'keyword',
+							'@default': 'variable'
+						}
+					}
+				],
+				[/(--?>?>|--?[)x])[+-]?/, 'transition'],
+				[/(:)([^:\n]*?$)/, ['delimiter.bracket', 'string']],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment']
+			],
+			classDiagram: [
+				[/(?!class\s)([a-zA-Z]+)(\s+[a-zA-Z]+)/, ['type', 'variable']],
+				[/(\*|<\|?|o)?(--|\.\.)(\*|\|?>|o)?/, 'transition'],
+				[/^\s*class\s(?!.*\{)/, 'keyword'],
+				[
+					/[a-zA-Z][\w$]*/,
+					{
+						cases: {
+							'@classDiagramBlockKeywords': 'typeKeyword',
+							'@classDiagramKeywords': 'keyword',
+							'@default': 'variable'
+						}
+					}
+				],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment'],
+				[/(<<)(.+?)(>>)/, ['delimiter.bracket', 'annotation', 'delimiter.bracket']],
+				[/".*?"/, 'string'],
+				[/:::/, 'transition'],
+				[/:|\+|-|#|~|\*\s*$|\$\s*$|\(|\)|{|}/, 'delimiter.bracket']
+			],
+			journey: [
+				[/(title)(.*)/, ['keyword', 'string']],
+				[/(section)(.*)/, ['typeKeyword', 'string']],
+				[
+					/[a-zA-Z][\w$]*/,
+					{
+						cases: {
+							'@journeyBlockKeywords': 'typeKeyword',
+							'@journeyKeywords': 'keyword',
+							'@default': 'variable'
+						}
+					}
+				],
+				[
+					/(^\s*.+?)(:)(.*?)(:)(.*?)([,$])/,
+					[
+						'string',
+						'delimiter.bracket',
+						'number',
+						'delimiter.bracket',
+						'variable',
+						'delimiter.bracket'
+					]
+				],
+				[/,/, 'delimiter.bracket'],
+				[/(^\s*.+?)(:)([^:]*?)$/, ['string', 'delimiter.bracket', 'variable']],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment']
+			],
+			gantt: [
+				[/(title)(.*)/, ['keyword', 'string']],
+				[/(section)(.*)/, ['typeKeyword', 'string']],
+				[
+					/[a-zA-Z][\w$]*/,
+					{
+						cases: {
+							'@ganttBlockKeywords': 'typeKeyword',
+							'@ganttKeywords': 'keyword'
+						}
+					}
+				],
+				[/(^\s*.*?)(:)/, ['string', 'delimiter.bracket']],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment'],
+				[/:/, 'delimiter.bracket']
+			],
+			stateDiagram: [
+				[/note[^:]*$/, { token: 'typeKeyword', next: 'stateDiagramNote' }],
+				['hide empty description', 'keyword'],
+				[/^\s*state\s(?!.*\{)/, 'keyword'],
+				[/(<<)(fork|join|choice)(>>)/, 'annotation'],
+				[/(\[\[)(fork|join|choice)(]])/, ['delimiter.bracket', 'annotation', 'delimiter.bracket']],
+				[
+					/[a-zA-Z][\w$]*/,
+					{
+						cases: {
+							'@stateDiagramBlockKeywords': 'typeKeyword',
+							'@stateDiagramKeywords': 'keyword',
+							'@default': 'variable'
+						}
+					}
+				],
+				[/".*?"/, 'string'],
+				[/(:)([^:\n]*?$)/, ['delimiter.bracket', 'string']],
+				[/{|}/, 'delimiter.bracket'],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment'],
+				[/-->/, 'transition'],
+				[/\[.*?]/, 'string']
+			],
+			stateDiagramNote: [
+				[/^\s*end note$/, { token: 'typeKeyword', next: '@pop' }],
+				[/.*/, 'string']
+			],
+			erDiagram: [
+				[/[}|][o|](--|\.\.)[o|][{|]/, 'transition'],
+				[/".*?"/, 'string'],
+				[/(:)(.*?$)/, ['delimiter.bracket', 'string']],
+				[/:|{|}/, 'delimiter.bracket'],
+				[/([a-zA-Z]+)(\s+[a-zA-Z]+)/, ['type', 'variable']],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment'],
+				[/[a-zA-Z_-][\w$]*/, 'variable']
+			],
+			requirementDiagram: [
+				[/->|<-|-/, 'transition'],
+				[/(\d+\.)*\d+/, 'number'],
+				[
+					/[a-zA-Z_-][\w$]*/,
+					{
+						cases: {
+							'@requirementDiagramBlockKeywords': 'typeKeyword',
+							'@default': 'variable'
+						}
+					}
+				],
+				[/:|{|}|\//, 'delimiter.bracket'],
+				[/%%[^$]([^%]*(?!%%$)%?)*$/, 'comment'],
+				[/".*?"/, 'string']
+			]
+		}
+	});
+
+	monacoEditor.editor.defineTheme('mermaid-dark', {
+		base: 'vs-dark',
+		inherit: true,
+		rules: [
+			{ token: 'typeKeyword', foreground: '9650c8', fontStyle: 'bold' },
+			{ token: 'transition', foreground: '008800', fontStyle: 'bold' }
+		]
+	});
+
+	monacoEditor.editor.defineTheme('mermaid', {
+		base: 'vs',
+		inherit: true,
+		rules: [
+			{ token: 'typeKeyword', foreground: '9650c8', fontStyle: 'bold' },
+			{ token: 'keyword', foreground: '649696' },
+			{ token: 'custom-error', foreground: 'ff0000', fontStyle: 'bold' },
+			{ token: 'string', foreground: 'AA8500' },
+			{ token: 'transition', foreground: '008800', fontStyle: 'bold' },
+			{ token: 'delimiter.bracket', foreground: '000000', fontStyle: 'bold' },
+			{ token: 'annotation', foreground: '4b4b96' },
+			{ token: 'number', foreground: '4b4b96' },
+			{ token: 'comment', foreground: '888c89' },
+			{ token: 'variable', foreground: 'A22889' },
+			{ token: 'type', foreground: '2BDEA8' }
+		]
+	});
+
+	// Register a completion item provider for the mermaid language
+	monacoEditor.languages.registerCompletionItemProvider('mermaid', {
+		provideCompletionItems: () => {
+			const suggestions = [
+				{
+					label: 'loop',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['loop ${1:Loop text}', '\t$0', 'end'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'Sequence Diagram Loops'
+				},
+				{
+					label: 'alt',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['alt ${1:Describing text}', '\t$0', 'else', '\t', 'end'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'Alternative Path'
+				},
+				{
+					label: 'opt',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['opt ${1:Describing text}', '\t$0', 'end'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'Optional Path'
+				},
+				{
+					label: 'par',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: [
+						'par ${1:[Action 1]}',
+						'\t$0',
+						'and ${2:[Action 2]}',
+						'\t',
+						'and ${3:[Action 3]}',
+						'\t',
+						'end'
+					].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'Parallel Actions'
+				},
+				{
+					label: 'rect',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['rect ${1:rgb(0, 255, 0)}', '\t$0', 'end'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'Background Color'
+				},
+				{
+					label: 'subgraph',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['subgraph ${1:title}', '\t$0', 'end'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'Subgraph'
+				},
+				{
+					label: 'class',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['class ${1:className} {', '\t$0', '}'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'Class'
+				},
+				{
+					label: 'state',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['state ${1:stateName} {', '\t$0', '}'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'State'
+				},
+				{
+					label: 'note',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['note ${1:right of State1}', '\t$0', 'end note'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'State'
+				},
+				{
+					label: 'section',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['section ${1:Go to work}', '\t$0'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'User-journey Section'
+				},
+				{
+					label: 'element',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['element ${1:test_entity} {', '\t$0', '}'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'User-journey Section'
+				},
+				{
+					label: 'options',
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: ['options', '{', '    $0', '}', 'end'].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: 'Git Graph Options'
+				},
+				...requirementDiagrams.map((requirementDiagramType) => ({
+					label: requirementDiagramType,
+					kind: monacoEditor.languages.CompletionItemKind.Snippet,
+					insertText: [
+						requirementDiagramType + ' ${1:test_req} {',
+						'\tid: 1',
+						'\ttext: the test text.',
+						'\trisk: high',
+						'\tverifyMethod: test',
+						'}'
+					].join('\n'),
+					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+					documentation: requirementDiagramType
+						.split(/(?=[A-Z])/)
+						.map((part) => part[0].toUpperCase() + part.slice(1))
+						.join(' ')
+				})),
+				...[
+					...new Set(
+						Object.values(keywords)
+							.map((diagramKeywords) =>
+								Object.entries(diagramKeywords)
+									.filter((keywordType) => keywordType[0] !== 'annotations')
+									.map((entry) => entry[1])
+							)
+							.flat(2)
+					)
+				].map((keyword) => ({
+					label: keyword,
+					kind: monacoEditor.languages.CompletionItemKind.Keyword,
+					insertText: keyword
+				}))
+			];
+			return { suggestions: suggestions };
+		}
+	});
+
+	monacoEditor.languages.setLanguageConfiguration('mermaid', {
+		autoClosingPairs: [
+			{
+				open: '(',
+				close: ')'
+			},
+			{
+				open: '{',
+				close: '}'
+			},
+			{
+				open: '[',
+				close: ']'
+			}
+		],
+		brackets: [
+			['(', ')'],
+			['{', '}'],
+			['[', ']']
+		]
+	});
+};

src/lib/components/history/history.svelte

@@ -0,0 +1,142 @@
+<script lang="ts">
+	import Card from '$lib/components/card/card.svelte';
+	import { codeStore, getStateString } from '$lib/util/state';
+	import {
+		addHistoryEntry,
+		historyModeStore,
+		clearHistoryData,
+		getPreviousState,
+		historyStore,
+		loaderHistoryStore
+	} from './history';
+	import { notify, prompt } from '$lib/util/notify';
+	import { onMount } from 'svelte';
+	import moment from 'moment';
+	import type { HistoryType, State, Tab } from '$lib/types';
+
+	const HISTORY_SAVE_INTERVAL = 60000;
+
+	const tabSelectHandler = (message: CustomEvent<Tab>) => {
+		historyModeStore.set(message.detail.id as HistoryType);
+	};
+	let tabs: Tab[] = [
+		{
+			id: 'manual',
+			title: 'Saved',
+			icon: 'far fa-bookmark'
+		},
+		{
+			id: 'auto',
+			title: 'Timeline',
+			icon: 'fas fa-history'
+		}
+	];
+
+	const saveHistory = (auto = false) => {
+		const currentState: string = getStateString();
+		const previousState: string = getPreviousState(auto);
+		if (previousState !== currentState) {
+			addHistoryEntry({
+				state: $codeStore,
+				time: Date.now(),
+				type: auto ? 'auto' : 'manual'
+			});
+		} else if (!auto) {
+			notify('State already saved.');
+		}
+	};
+
+	const clearHistory = (date?: number): void => {
+		if (!date && !prompt('Clear all saved items?')) {
+			return;
+		}
+		clearHistoryData(date);
+	};
+
+	const restoreHistory = (state: State): void => {
+		codeStore.set({ ...state, updateEditor: true, updateDiagram: true });
+	};
+
+	const relativeTime = (time: number) => {
+		const t = new Date(time);
+		return `${new Date(t).toLocaleString()} (${moment(t).fromNow()})`;
+	};
+
+	onMount(() => {
+		historyModeStore.set('manual');
+		setInterval(() => {
+			saveHistory(true);
+		}, HISTORY_SAVE_INTERVAL);
+	});
+
+	loaderHistoryStore.subscribe((entries) => {
+		if (entries.length > 0 && tabs.length === 2) {
+			tabs = [
+				{
+					id: 'loader',
+					title: 'Revisions',
+					icon: 'fab fa-git-alt'
+				},
+				...tabs
+			];
+			historyModeStore.set('loader');
+		}
+	});
+
+	let isOpen = false;
+</script>
+
+<Card on:select={tabSelectHandler} bind:isOpen {tabs} title="History">
+	<div slot="actions">
+		<button
+			id="saveHistory"
+			class="btn btn-xs btn-success w-12"
+			on:click|stopPropagation={() => saveHistory()}
+			title="Save current state"><i class="far fa-save" /></button>
+		{#if $historyModeStore !== 'loader'}
+			<button
+				id="clearHistory"
+				class="btn btn-xs btn-error w-12"
+				on:click|stopPropagation={() => clearHistory()}
+				title="Delete all saved states"><i class="fas fa-trash-alt" /></button>
+		{/if}
+	</div>
+	<ul class="p-2 space-y-2 overflow-auto h-56" id="historyList">
+		{#if $historyStore.length > 0}
+			{#each $historyStore as { state, time, name, url, type }}
+				<li class="rounded p-2 shadow flex-col">
+					<div class="flex">
+						<div class="flex-1">
+							<div class="flex flex-col text-base-content">
+								{#if url}
+									<a
+										href={url}
+										target="_blank"
+										title="Open revision in new tab"
+										class="hover:underline text-blue-500">{name}</a>
+								{:else}
+									<span>{name}</span>
+								{/if}
+								<span class="text-gray-400 text-sm">{relativeTime(time)}</span>
+							</div>
+						</div>
+						<div class="flex gap-2 content-center">
+							<button class="btn btn-success" on:click={() => restoreHistory(state)}
+								><i class="fas fa-undo mr-1" />Restore</button>
+							{#if type !== 'loader'}
+								<button class="btn btn-error" on:click={() => clearHistory(time)}
+									><i class="fas fa-trash-alt mr-1" />Delete</button>
+							{/if}
+						</div>
+					</div>
+				</li>
+			{/each}
+		{:else}
+			<div class="m-2">
+				No items in History<br />
+				Click the Save button to save current state and restore it later.<br />
+				Timeline will automatically be saved every minute.
+			</div>
+		{/if}
+	</ul>
+</Card>

src/lib/components/history/history.ts

@@ -0,0 +1,77 @@
+import { derived, writable, get } from 'svelte/store';
+import type { Readable, Writable } from 'svelte/store';
+import { persist, localStorage } from '@macfja/svelte-persistent-store';
+import { generateSlug } from 'random-word-slugs';
+import type { HistoryEntry, HistoryType } from '$lib/types';
+
+const MAX_AUTO_HISTORY_LENGTH = 30;
+
+export const historyModeStore: Writable<HistoryType> = persist(
+	writable('manual'),
+	localStorage(),
+	'autoHistoryMode'
+);
+
+const autoHistoryStore: Writable<HistoryEntry[]> = persist(
+	writable([]),
+	localStorage(),
+	'autoHistoryStore'
+);
+
+const manualHistoryStore: Writable<HistoryEntry[]> = persist(
+	writable([]),
+	localStorage(),
+	'manualHistoryStore'
+);
+
+export const loaderHistoryStore: Writable<HistoryEntry[]> = writable([] as HistoryEntry[]);
+
+export const historyStore: Readable<HistoryEntry[]> = derived(
+	[historyModeStore, autoHistoryStore, manualHistoryStore, loaderHistoryStore],
+	([historyMode, autoHistories, manualHistories, loadedHistories], set) => {
+		if (historyMode === 'auto') {
+			set(autoHistories);
+		} else if (historyMode === 'manual') {
+			set(manualHistories);
+		} else if (historyMode === 'loader') {
+			set(loadedHistories);
+		} else {
+			set(autoHistories);
+		}
+	}
+);
+
+export const addHistoryEntry = (entry: HistoryEntry): void => {
+	if (entry.type === 'loader') {
+		loaderHistoryStore.update((entries) => [entry, ...entries]);
+		return;
+	}
+	entry.name = generateSlug(2);
+	if (entry.type !== 'auto') {
+		manualHistoryStore.update((entries) => [entry, ...entries]);
+		return;
+	}
+	autoHistoryStore.update((entries) => {
+		if (entries.length === MAX_AUTO_HISTORY_LENGTH) {
+			entries.pop();
+		}
+		return [entry, ...entries];
+	});
+};
+
+export const clearHistoryData = (time?: number): void => {
+	(get(historyModeStore) === 'auto' ? autoHistoryStore : manualHistoryStore).update((entries) => {
+		if (get(historyModeStore) !== 'loader') {
+			entries = entries.filter((entry) => time && entry.time != time);
+		}
+		return entries;
+	});
+};
+
+export const getPreviousState = (auto: boolean): string => {
+	const entries = get(auto ? autoHistoryStore : manualHistoryStore);
+	if (entries.length > 0) {
+		return JSON.stringify(entries[0].state);
+	}
+	return '';
+};

src/lib/components/navbar.svelte

@@ -0,0 +1,82 @@
+<script context="module">
+	import { version } from 'mermaid/package.json';
+	import { analytics } from '$lib/util/stats';
+	analytics?.track('version', {
+		mermaidVersion: version
+	});
+</script>
+
+<script lang="ts">
+	import Theme from './theme.svelte';
+
+	interface Link {
+		title: string;
+		href: string;
+		icon?: string;
+	}
+	const links: Link[] = [
+		{
+			title: 'Documentation',
+			href: 'https://mermaid-js.github.io/mermaid/#/n00b-gettingStarted'
+		},
+		{
+			title: 'Tutorial',
+			href: 'https://github.com/mermaid-js/mermaid/blob/develop/docs/Tutorials.md'
+		},
+		{
+			title: 'Mermaid',
+			href: 'https://github.com/mermaid-js/mermaid'
+		},
+		{
+			title: 'CLI',
+			href: 'https://github.com/mermaid-js/mermaid-cli'
+		},
+		{
+			title: '',
+			href: 'https://github.com/mermaid-js/mermaid-live-editor',
+			icon: 'fab fa-github fa-lg'
+		}
+	];
+</script>
+
+<div class="navbar mb-2 shadow-lg bg-primary">
+	<div class="flex-1 px-2 mx-2">
+		<span class="text-lg font-bold">
+			<a href="/">Mermaid<span class="text-xs font-thin">v{version}</span> Live Editor</a>
+		</span>
+	</div>
+	<label for="menu-toggle" class="pointer-cursor lg:hidden block"
+		><svg
+			class="fill-current "
+			xmlns="http://www.w3.org/2000/svg"
+			width="20"
+			height="20"
+			viewBox="0 0 20 20"
+			><title>Menu</title><path d="M0 3h20v2H0V3zm0 6h20v2H0V9zm0 6h20v2H0v-2z" /></svg
+		></label>
+	<input class="hidden" type="checkbox" id="menu-toggle" />
+
+	<Theme />
+	<div class="hidden lg:flex lg:items-center lg:w-auto w-full" id="menu">
+		<ul class="lg:flex items-center justify-between text-base pt-4 lg:pt-0">
+			{#each links as { title, href, icon }}
+				<li>
+					<a class="btn btn-ghost" target="_blank" {href}>
+						{#if icon}
+							<i class={icon} />
+						{/if}
+						{title}</a>
+				</li>
+			{/each}
+		</ul>
+	</div>
+</div>
+
+<style>
+	#menu-toggle:checked + #menu {
+		display: block;
+	}
+	.navbar {
+		z-index: 10000;
+	}
+</style>

src/lib/components/preset.svelte

@@ -0,0 +1,115 @@
+<script lang="ts">
+	import { updateCode } from '$lib/util/state';
+	import Card from '$lib/components/card/card.svelte';
+
+	const samples = {
+		'Flow Chart': `graph TD
+    A[Christmas] -->|Get money| B(Go shopping)
+    B --> C{Let me think}
+    C -->|One| D[Laptop]
+    C -->|Two| E[iPhone]
+    C -->|Three| F[fa:fa-car Car]`,
+		'Sequence Diagram': `sequenceDiagram
+    Alice->>+John: Hello John, how are you?
+    Alice->>+John: John, can you hear me?
+    John-->>-Alice: Hi Alice, I can hear you!
+    John-->>-Alice: I feel great!
+            `,
+		'Class Diagram': `classDiagram
+    Animal <|-- Duck
+    Animal <|-- Fish
+    Animal <|-- Zebra
+    Animal : +int age
+    Animal : +String gender
+    Animal: +isMammal()
+    Animal: +mate()
+    class Duck{
+      +String beakColor
+      +swim()
+      +quack()
+    }
+    class Fish{
+      -int sizeInFeet
+      -canEat()
+    }
+    class Zebra{
+      +bool is_wild
+      +run()
+    }
+            `,
+		'State Diagram': `stateDiagram-v2
+    [*] --> Still
+    Still --> [*]
+    Still --> Moving
+    Moving --> Still
+    Moving --> Crash
+    Crash --> [*]
+            `,
+		'Gantt Chart': `gantt
+    title A Gantt Diagram
+    dateFormat  YYYY-MM-DD
+    section Section
+    A task           :a1, 2014-01-01, 30d
+    Another task     :after a1  , 20d
+    section Another
+    Task in sec      :2014-01-12  , 12d
+    another task      : 24d
+            `,
+		'Pie Chart': `pie title Pets adopted by volunteers
+    "Dogs" : 386
+    "Cats" : 85
+    "Rats" : 15
+            `,
+		'ER Diagram': `erDiagram
+          CUSTOMER }|..|{ DELIVERY-ADDRESS : has
+          CUSTOMER ||--o{ ORDER : places
+          CUSTOMER ||--o{ INVOICE : "liable for"
+          DELIVERY-ADDRESS ||--o{ ORDER : receives
+          INVOICE ||--|{ ORDER : covers
+          ORDER ||--|{ ORDER-ITEM : includes
+          PRODUCT-CATEGORY ||--|{ PRODUCT : contains
+          PRODUCT ||--o{ ORDER-ITEM : "ordered in"
+            `,
+		'Git Graph': `gitGraph:
+options
+{
+    "nodeSpacing": 150,
+    "nodeRadius": 10
+}
+end
+commit
+branch newbranch
+checkout newbranch
+commit
+commit
+checkout master
+commit
+commit
+merge newbranch
+
+            `,
+		'User Journey': `  journey
+    title My working day
+    section Go to work
+      Make tea: 5: Me
+      Go upstairs: 3: Me
+      Do work: 1: Me, Cat
+    section Go home
+      Go downstairs: 5: Me
+      Sit down: 3: Me
+      `
+	};
+
+	const loadSampleDiagram = (diagramType: string): void => {
+		updateCode(samples[diagramType], true, true);
+	};
+</script>
+
+<Card title="Sample Diagrams" isOpen={false}>
+	<div class="flex gap-2 flex-wrap p-2">
+		{#each Object.keys(samples) as sample}
+			<button class="btn btn-primary normal-case btn-sm" on:click={() => loadSampleDiagram(sample)}
+				>{sample}</button>
+		{/each}
+	</div>
+</Card>

src/lib/components/theme.svelte

@@ -0,0 +1,59 @@
+<script>
+	import { setTheme, themeStore } from '$lib/util/theme';
+
+	const themes = [
+		'🌝  light',
+		'🌚  dark',
+		'🧁  cupcake',
+		'🐝  bumblebee',
+		'✳️  emerald',
+		'🏢  corporate',
+		'🌃  synthwave',
+		'👴  retro',
+		'🤖  cyberpunk',
+		'🌸  valentine',
+		'🎃  halloween',
+		'🌷  garden',
+		'🌲  forest',
+		'🐟  aqua',
+		'👓  lofi',
+		'🖍  pastel',
+		'🧚‍♀️  fantasy',
+		'📝  wireframe',
+		'🏴  black',
+		'💎  luxury',
+		'🧛‍♂️  dracula'
+	];
+</script>
+
+<div class="hidden lg:block dropdown">
+	<div tabindex="0" class="btn btn-ghost ">
+		<svg
+			xmlns="http://www.w3.org/2000/svg"
+			fill="none"
+			viewBox="0 0 24 24"
+			class="inline-block w-6 h-6 stroke-current md:mr-2"
+			><path
+				stroke-linecap="round"
+				stroke-linejoin="round"
+				stroke-width="2"
+				d="M7 21a4 4 0 01-4-4V5a2 2 0 012-2h4a2 2 0 012 2v12a4 4 0 01-4 4zm0 0h12a2 2 0 002-2v-4a2 2 0 00-2-2h-2.343M11 7.343l1.657-1.657a2 2 0 012.828 0l2.829 2.829a2 2 0 010 2.828l-8.486 8.485M7 17h.01" /></svg>
+		<span class="hidden md:inline"> Change Theme </span>
+		<svg
+			xmlns="http://www.w3.org/2000/svg"
+			viewBox="0 0 1792 1792"
+			class="inline-block w-4 h-4 ml-1 fill-current"
+			><path
+				d="M1395 736q0 13-10 23l-466 466q-10 10-23 10t-23-10l-466-466q-10-10-10-23t10-23l50-50q10-10 23-10t23 10l393 393 393-393q10-10 23-10t23 10l50 50q10 10 10 23z" /></svg>
+	</div>
+	<div
+		class="mt-14 overflow-y-auto shadow-2xl top-px dropdown-content h-96 w-56 bg-base-200 text-base-content">
+		<ul tabindex="0" class="p-4 menu compact">
+			{#each themes as theme}
+				<li class={theme.includes($themeStore.theme) ? 'bordered' : ''}>
+					<span class="btn btn-ghost justify-start" on:click={() => setTheme(theme)}>{theme}</span>
+				</li>
+			{/each}
+		</ul>
+	</div>
+</div>

src/lib/components/view.svelte

@@ -0,0 +1,72 @@
+<script lang="ts">
+	import { errorStore } from '$lib/util/error';
+
+	import { codeStore } from '$lib/util/state';
+	import { onMount } from 'svelte';
+	import mermaid from 'mermaid';
+
+	let code = '';
+	let config = '';
+	let container: HTMLDivElement;
+	let view: HTMLDivElement;
+	let error = false;
+	let outOfSync = false;
+	let manualUpdate = true;
+	onMount(() => {
+		codeStore.subscribe((state) => {
+			try {
+				if (container && state && (state.updateDiagram || state.autoSync)) {
+					if (!state.autoSync) {
+						$codeStore.updateDiagram = false;
+					}
+					outOfSync = false;
+					manualUpdate = true;
+					if (code === state.code && config === state.mermaid) {
+						// Do not render if there is no change in Code/Config
+						return;
+					}
+					code = state.code;
+					config = state.mermaid;
+					const scroll = view.parentElement.scrollTop;
+					delete container.dataset.processed;
+					mermaid.initialize(Object.assign({}, JSON.parse(state.mermaid)));
+					mermaid.render('graph-div', code, (svgCode) => {
+						container.innerHTML = svgCode;
+					});
+					view.parentElement.scrollTop = scroll;
+					error = false;
+				} else if (manualUpdate) {
+					manualUpdate = false;
+				} else {
+					outOfSync = true;
+				}
+			} catch (e) {
+				console.log('view fail', e);
+				error = true;
+			}
+		});
+		errorStore.subscribe((err) => {
+			if (typeof err === 'undefined') {
+				error = false;
+			} else {
+				error = true;
+				console.log('Error: ', err);
+			}
+		});
+	});
+</script>
+
+<div id="view" bind:this={view} class="p-2" class:error class:outOfSync>
+	<div id="container" bind:this={container} class="flex-1 overflow-auto" />
+</div>
+
+<style>
+	#view {
+		border: 1px solor darkred;
+		flex: 1;
+	}
+	.error,
+	.outOfSync {
+		opacity: 0.5;
+	}
+</style>

src/lib/types.d.ts

@@ -0,0 +1,60 @@
+/**
+ * Can be made globally available by placing this
+ * inside `global.d.ts` and removing `export` keyword
+ */
+export interface Locals {
+	userid: string;
+}
+
+export interface EditorUpdateEvent {
+	text: string;
+}
+export interface EditorEvents {
+	update: EditorUpdateEvent;
+}
+
+export interface TabEvents {
+	select: Tab;
+}
+
+export interface Tab {
+	id: string;
+	title: string;
+	icon: string;
+}
+
+export interface State {
+	code: string;
+	mermaid: string;
+	updateEditor: boolean;
+	updateDiagram: boolean;
+	autoSync: boolean;
+	loader?: LoaderConfig;
+}
+
+export interface GistLoaderConfig {
+	url: string;
+}
+
+export interface LoadingState {
+	loading: boolean;
+	message?: string;
+}
+export interface FileLoaderConfig {
+	codeURL: string;
+	configURL?: string;
+}
+export interface LoaderConfig {
+	type: 'gist' | 'files';
+	config: GistLoaderConfig | FileLoaderConfig;
+}
+export type HistoryType = 'auto' | 'manual' | 'loader';
+export interface HistoryEntry {
+	state: State;
+	time: number;
+	name?: string;
+	type: HistoryType;
+	url?: string;
+}
+
+type Loader = (url: string) => Promise<State>;

src/lib/util/error.ts

@@ -0,0 +1,3 @@
+import { writable } from 'svelte/store';
+
+export const errorStore = writable(undefined);

src/lib/util/fileLoaders/gist.ts

@@ -0,0 +1,105 @@
+/* eslint-disable @typescript-eslint/no-unsafe-assignment */
+/* eslint-disable @typescript-eslint/no-unsafe-member-access */
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import type { State } from '$lib/types';
+import { defaultState } from '../state';
+import { addHistoryEntry } from '../../components/history/history';
+
+const codeFileName = 'code.mmd';
+const configFileName = 'config.json';
+
+const isValidGist = (files: any): boolean => {
+	return codeFileName in files;
+};
+
+const getFileContent = async (file: any): Promise<string> => {
+	if (file.truncated) {
+		return await (await fetch(file.raw_url)).text();
+	}
+	return file.content;
+};
+
+interface GistData {
+	code: string;
+	config?: string;
+	author: string;
+	time: number;
+	version: string;
+	url: string;
+}
+
+const getGistData = async (gistURL: string): Promise<GistData> => {
+	// eslint-disable-next-line @typescript-eslint/no-unused-vars
+	const [_, __, gistID, revisionID] = gistURL.split('github.com').pop().split('/');
+	// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+	const { html_url, files, history } = await (
+		await fetch(`https://api.github.com/gists/${gistID}${revisionID ? '/' + revisionID : ''}`)
+	).json();
+	if (isValidGist(files)) {
+		const code = await getFileContent(files[codeFileName]);
+		let config: string;
+		if (configFileName in files) {
+			config = await getFileContent(files[configFileName]);
+		}
+		const currentItem = history[0];
+		return {
+			url: `${html_url}/${currentItem.version}`,
+			code,
+			config,
+			author: currentItem.user.login,
+			time: new Date(currentItem.committed_at).getTime(),
+			version: (currentItem.version as string).slice(-7)
+		};
+	} else {
+		throw 'Invalid gist provided';
+	}
+};
+
+const getStateFromGist = (gist: GistData, gistURL: string = gist.url): State => {
+	const state: State = {
+		...defaultState,
+		code: gist.code,
+		loader: {
+			type: 'gist',
+			config: {
+				url: gistURL
+			}
+		}
+	};
+	gist.config && (state.mermaid = gist.config);
+	return state;
+};
+
+export const loadGistData = async (gistURL: string): Promise<State> => {
+	try {
+		// eslint-disable-next-line @typescript-eslint/no-unused-vars
+		const [_, __, gistID, revisionID] = gistURL.split('github.com').pop().split('/');
+		// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+		const { history } = await (
+			await fetch(`https://api.github.com/gists/${gistID}${revisionID ? '/' + revisionID : ''}`)
+		).json();
+		const gistHistory: GistData[] = [];
+		for (const entry of history) {
+			// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+			const data: GistData = await getGistData(entry.url).catch(() => undefined);
+			data && gistHistory.push(data);
+		}
+		if (gistHistory.length === 0) {
+			throw 'Invalid gist provided';
+		}
+		gistHistory.reverse();
+		const state = getStateFromGist(gistHistory.slice(-1).pop(), gistURL);
+		for (const gist of gistHistory) {
+			addHistoryEntry({
+				state: getStateFromGist(gist),
+				time: gist.time,
+				type: 'loader',
+				url: gist.url,
+				name: `${gist.author} v${gist.version}`
+			});
+		}
+		return state;
+	} catch (err) {
+		console.error(err);
+	}
+};

src/lib/util/fileLoaders/loader.ts

@@ -0,0 +1,58 @@
+import { loadGistData } from './gist';
+import { updateCodeStore, defaultState } from '../state';
+import type { Loader, State } from '$lib/types';
+const loaders: Record<string, Loader> = {
+	gist: loadGistData
+};
+
+export const loadDataFromUrl = async (): Promise<void> => {
+	const searchParams = new URLSearchParams(window.location.search);
+	let state: State = defaultState;
+	let code: string, config: string;
+	let loaded = false;
+	const codeURL: string = searchParams.get('code');
+	const configURL: string = searchParams.get('config');
+
+	if (codeURL) {
+		code = await (await fetch(codeURL)).text();
+		loaded = true;
+	}
+	if (configURL) {
+		config = await (await fetch(configURL)).text();
+	} else {
+		config = defaultState.mermaid;
+	}
+	if (!code) {
+		for (const [key, value] of searchParams.entries()) {
+			if (key in loaders) {
+				try {
+					state = await loaders[key](value);
+					loaded = true;
+					break;
+				} catch (err) {
+					console.error(err);
+				}
+			}
+		}
+	} else {
+		state = {
+			code,
+			mermaid: config,
+			loader: {
+				type: 'files',
+				config: {
+					codeURL,
+					configURL
+				}
+			}
+		} as State;
+	}
+	loaded &&
+		updateCodeStore({
+			...state,
+			autoSync: true,
+			updateDiagram: true,
+			updateEditor: true
+		});
+	// window.location.search = '';
+};

src/lib/util/loading.ts

@@ -0,0 +1,20 @@
+import { writable } from 'svelte/store';
+import type { Writable } from 'svelte/store';
+import type { LoadingState } from '$lib/types';
+
+const defaultLoading: LoadingState = {
+	loading: false
+};
+
+export const loadingStateStore: Writable<LoadingState> = writable(defaultLoading);
+export const initLoading = async <T>(message: string, task: Promise<T>): Promise<T> => {
+	loadingStateStore.set({
+		loading: true,
+		message
+	});
+	const result: T = await task;
+	loadingStateStore.set({
+		loading: false
+	});
+	return result;
+};

src/lib/util/notify.ts

@@ -0,0 +1,7 @@
+export const notify = (message: string): void => {
+	alert(message);
+};
+
+export const prompt = (message: string): boolean => {
+	return confirm(message);
+};

src/lib/util/state.ts

@@ -0,0 +1,114 @@
+import { writable, get, derived } from 'svelte/store';
+import { toBase64, fromBase64 } from 'js-base64';
+import { persist, localStorage } from '@macfja/svelte-persistent-store';
+import type { State } from '$lib/types';
+import { saveStatistics } from './stats';
+
+export const defaultState: State = {
+	code: `graph TD
+    A[Christmas] -->|Get money| B(Go shopping)
+    B --> C{Let me think}
+    C -->|One| D[Laptop]
+    C -->|Two| E[iPhone]
+    C -->|Three| F[fa:fa-car Car]
+  `,
+	mermaid: JSON.stringify(
+		{
+			theme: 'default'
+		},
+		null,
+		2
+	),
+	updateEditor: false,
+	autoSync: true,
+	updateDiagram: true
+};
+
+export const codeStore = persist(writable(defaultState), localStorage(), 'codeStore');
+export const base64State = derived([codeStore], ([code], set) => {
+	set(toBase64(JSON.stringify(code), true));
+});
+
+export const loadState = (data: string): void => {
+	let state: State;
+	try {
+		const stateStr = fromBase64(data);
+		console.log(`Trying to load state: ${stateStr}`);
+		state = JSON.parse(stateStr);
+		const mermaidConfig =
+			typeof state.mermaid === 'string' ? JSON.parse(state.mermaid) : state.mermaid;
+		if (
+			mermaidConfig.securityLevel &&
+			mermaidConfig.securityLevel !== 'strict' &&
+			confirm(
+				`Removing "securityLevel":"${mermaidConfig.securityLevel}" from the config for safety.\nClick Cancel if you trust the source of this Diagram.`
+			)
+		) {
+			delete mermaidConfig.securityLevel; // Prevent setting overriding securityLevel when loading state to mitigate possible XSS attack
+		}
+
+		state.mermaid = JSON.stringify(mermaidConfig, null, 2);
+	} catch (e) {
+		if (data) {
+			console.error('Init error', e);
+		}
+		state = get(codeStore);
+		console.log(state);
+	}
+	updateCodeStore({ ...state, updateEditor: true });
+};
+
+export const updateCodeStore = (newState: State): void => {
+	codeStore.update((state) => {
+		return { ...state, ...newState };
+	});
+};
+
+let prompted = false;
+export const updateCode = (code: string, updateEditor: boolean, updateDiagram = false): void => {
+	saveStatistics(code);
+	const lines = (code.match(/\n/g) || '').length + 1;
+
+	if (lines > 50 && !prompted && get(codeStore).autoSync) {
+		const turnOff = confirm(
+			'Long diagram detected. Turn off Auto Sync? Click the sync logo to manually sync.'
+		);
+		prompted = true;
+		if (turnOff) {
+			updateCodeStore({
+				autoSync: false
+			} as State);
+		}
+	}
+
+	codeStore.update((state) => {
+		return { ...state, code, updateEditor, updateDiagram };
+	});
+};
+
+export const updateConfig = (config: string, updateEditor: boolean): void => {
+	codeStore.update((state) => {
+		return { ...state, mermaid: config, updateEditor };
+	});
+};
+
+export const toggleDarkTheme = (dark: boolean): void => {
+	codeStore.update((state) => {
+		const config = JSON.parse(state.mermaid);
+		if (!config.theme || ['dark', 'default'].includes(config.theme)) {
+			config.theme = dark ? 'dark' : 'default';
+		}
+
+		return { ...state, mermaid: JSON.stringify(config, null, 2), updateEditor: true };
+	});
+};
+
+export const initURLSubscription = (): void => {
+	base64State.subscribe((state: string) => {
+		history.replaceState(undefined, undefined, `#${state}`);
+	});
+};
+
+export const getStateString = (): string => {
+	return JSON.stringify(get(codeStore));
+};

src/lib/util/stats.ts

@@ -0,0 +1,49 @@
+import { browser } from '$app/env';
+import type { AnalyticsInstance } from 'analytics';
+
+export let analytics: AnalyticsInstance;
+
+export const initAnalytics = async (): Promise<void> => {
+	if (browser && !analytics) {
+		try {
+			const { Analytics } = await import('analytics');
+			// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+			const googleAnalytics = await import('@analytics/google-analytics');
+			analytics = Analytics({
+				app: 'mermaid-live-editor',
+				// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+				plugins: [
+					// eslint-disable-next-line @typescript-eslint/no-unsafe-call, @typescript-eslint/no-unsafe-member-access
+					googleAnalytics.init({
+						trackingId: 'UA-153180559-1'
+					})
+				]
+			});
+		} catch {
+			console.info('Analytics blocked ;)');
+		}
+	}
+};
+
+const detectType = (text: string): string => {
+	return text
+		.replace(/^\s*%%.*\n/g, '\n')
+		.trimStart()
+		.split(' ')[0];
+};
+
+// manual debounce
+let timeout;
+export const saveStatistics = (graph: string): void => {
+	if (analytics) {
+		clearTimeout(timeout);
+		// Only save statistics after a 5 sec delay
+		timeout = setTimeout(function () {
+			const graphType = detectType(graph);
+			console.debug('ga:', 'send', 'event', 'render', graphType);
+			void analytics.track('render', {
+				graphType
+			});
+		}, 5000);
+	}
+};

src/lib/util/theme.ts

@@ -0,0 +1,36 @@
+import { writable } from 'svelte/store';
+import type { Writable } from 'svelte/store';
+import { persist, localStorage } from '@macfja/svelte-persistent-store';
+
+export interface ThemeConfig {
+	isDark: boolean;
+	theme?: string;
+}
+
+export const themeStore: Writable<ThemeConfig> = persist(
+	writable({
+		isDark: false
+	}),
+	localStorage(),
+	'themeStore'
+);
+
+const darkThemes = [
+	'dark',
+	'synthwave',
+	'halloween',
+	'aqua',
+	'forest',
+	'luxury',
+	'black',
+	'dracula'
+];
+
+export const setTheme = (theme: string): void => {
+	if (theme.includes(' ')) {
+		theme = theme.split(' ')[1].trim();
+	}
+	const isDark = darkThemes.includes(theme);
+	console.log('Setting theme', theme);
+	themeStore.set({ theme, isDark });
+};

src/lib/util/util.ts

@@ -0,0 +1,24 @@
+import type { State } from '$lib/types';
+import { initURLSubscription, loadState, updateCodeStore } from './state';
+import { analytics, initAnalytics } from './stats';
+import { loadDataFromUrl } from './fileLoaders/loader';
+import { initLoading } from './loading';
+
+export const loadStateFromURL = (): void => {
+	loadState(window.location.hash.slice(1));
+};
+
+export const syncDiagram = (): void => {
+	updateCodeStore({
+		updateDiagram: true
+	} as State);
+};
+
+export const initHandler = async (): Promise<void> => {
+	loadStateFromURL();
+	await initLoading('Loading Gist...', loadDataFromUrl().catch(console.error));
+	syncDiagram();
+	initURLSubscription();
+	await initAnalytics();
+	analytics?.page();
+};

src/main.js

@@ -1,12 +0,0 @@
-import App from './App.svelte';
-
-const app = new App({
-  target: document.body,
-  props: {
-    name: 'world',
-  },
-});
-
-window.app = app;
-
-export default app;

src/mermaid-language/mermaid.contribution.js

@@ -1,14 +0,0 @@
-/*---------------------------------------------------------------------------------------------
- *  Copyright (c) Microsoft Corporation. All rights reserved.
- *  Licensed under the MIT License. See License.txt in the project root for license information.
- *--------------------------------------------------------------------------------------------*/
-'use strict';
-import { registerLanguage } from 'monaco-editor/dev/vs/basic-languages/_.contribution.js';
-registerLanguage({
-  id: 'mermaid',
-  extensions: ['.mmd'],
-  aliases: ['mermaid', 'MERMAID'],
-  loader: function () {
-    return import('./mermaid.js');
-  },
-});

src/mermaid-language/mermaid.js

@@ -1,498 +0,0 @@
-/*---------------------------------------------------------------------------------------------
- *  Copyright (c) Microsoft Corporation. All rights reserved.
- *  Licensed under the MIT License. See License.txt in the project root for license information.
- *--------------------------------------------------------------------------------------------*/
-'use strict';
-export var conf = {
-  comments: {
-    lineComment: '*',
-  },
-  brackets: [
-    ['[', ']'],
-    ['(', ')'],
-  ],
-};
-var abapKeywords = [
-  'abstract',
-  'add',
-  'add-corresponding',
-  'adjacent',
-  'alias',
-  'aliases',
-  'all',
-  'append',
-  'appending',
-  'ascending',
-  'as',
-  'assert',
-  'assign',
-  'assigned',
-  'assigning',
-  'association',
-  'authority-check',
-  'back',
-  'begin',
-  'binary',
-  'block',
-  'bound',
-  'break-point',
-  'by',
-  'byte',
-  'class',
-  'call',
-  'cast',
-  'changing',
-  'check',
-  'class-data',
-  'class-method',
-  'class-methods',
-  'clear',
-  'close',
-  'cnt',
-  'collect',
-  'commit',
-  'cond',
-  'character',
-  'corresponding',
-  'communication',
-  'component',
-  'compute',
-  'concatenate',
-  'condense',
-  'constants',
-  'conv',
-  'count',
-  'controls',
-  'convert',
-  'create',
-  'currency',
-  'data',
-  'descending',
-  'default',
-  'define',
-  'deferred',
-  'delete',
-  'describe',
-  'detail',
-  'display',
-  'divide',
-  'divide-corresponding',
-  'display-mode',
-  'duplicates',
-  'deleting',
-  'editor-call',
-  'end',
-  'endexec',
-  'endfunction',
-  'ending',
-  'endmodule',
-  'end-of-definition',
-  'end-of-page',
-  'end-of-selection',
-  'end-test-injection',
-  'end-test-seam',
-  'exit-command',
-  'endclass',
-  'endmethod',
-  'endform',
-  'endinterface',
-  'endprovide',
-  'endselect',
-  'endtry',
-  'endwhile',
-  'enum',
-  'event',
-  'events',
-  'exec',
-  'exit',
-  'export',
-  'exporting',
-  'extract',
-  'exception',
-  'exceptions',
-  'field-symbols',
-  'field-groups',
-  'field',
-  'first',
-  'fetch',
-  'fields',
-  'format',
-  'frame',
-  'free',
-  'from',
-  'function',
-  'find',
-  'for',
-  'found',
-  'function-pool',
-  'generate',
-  'get',
-  'handle',
-  'hide',
-  'hashed',
-  'include',
-  'import',
-  'importing',
-  'index',
-  'infotypes',
-  'initial',
-  'initialization',
-  'id',
-  'is',
-  'in',
-  'interface',
-  'interfaces',
-  'init',
-  'input',
-  'insert',
-  'instance',
-  'into',
-  'key',
-  'left-justified',
-  'leave',
-  'like',
-  'line',
-  'line-count',
-  'line-size',
-  'load',
-  'local',
-  'log-point',
-  'length',
-  'left',
-  'leading',
-  'lower',
-  'matchcode',
-  'method',
-  'mesh',
-  'message',
-  'message-id',
-  'methods',
-  'modify',
-  'module',
-  'move',
-  'move-corresponding',
-  'multiply',
-  'multiply-corresponding',
-  'match',
-  'new',
-  'new-line',
-  'new-page',
-  'new-section',
-  'next',
-  'no',
-  'no-gap',
-  'no-gaps',
-  'no-sign',
-  'no-zero',
-  'non-unique',
-  'number',
-  'occurrence',
-  'object',
-  'obligatory',
-  'of',
-  'output',
-  'overlay',
-  'optional',
-  'others',
-  'occurrences',
-  'occurs',
-  'offset',
-  'options',
-  'pack',
-  'parameters',
-  'perform',
-  'places',
-  'position',
-  'print-control',
-  'private',
-  'program',
-  'protected',
-  'provide',
-  'public',
-  'put',
-  'radiobutton',
-  'raising',
-  'ranges',
-  'receive',
-  'receiving',
-  'redefinition',
-  'reduce',
-  'reference',
-  'refresh',
-  'regex',
-  'reject',
-  'results',
-  'requested',
-  'ref',
-  'replace',
-  'report',
-  'reserve',
-  'restore',
-  'result',
-  'return',
-  'returning',
-  'right-justified',
-  'rollback',
-  'read',
-  'read-only',
-  'rp-provide-from-last',
-  'run',
-  'scan',
-  'screen',
-  'scroll',
-  'search',
-  'select',
-  'select-options',
-  'selection-screen',
-  'stamp',
-  'source',
-  'subkey',
-  'separated',
-  'set',
-  'shift',
-  'single',
-  'skip',
-  'sort',
-  'sorted',
-  'split',
-  'standard',
-  'stamp',
-  'starting',
-  'start-of-selection',
-  'sum',
-  'subtract-corresponding',
-  'statics',
-  'step',
-  'stop',
-  'structure',
-  'submatches',
-  'submit',
-  'subtract',
-  'summary',
-  'supplied',
-  'suppress',
-  'section',
-  'syntax-check',
-  'syntax-trace',
-  'system-call',
-  'switch',
-  'tables',
-  'table',
-  'task',
-  'testing',
-  'test-seam',
-  'test-injection',
-  'then',
-  'time',
-  'times',
-  'title',
-  'titlebar',
-  'to',
-  'top-of-page',
-  'trailing',
-  'transfer',
-  'transformation',
-  'translate',
-  'transporting',
-  'types',
-  'type',
-  'type-pool',
-  'type-pools',
-  'unassign',
-  'unique',
-  'uline',
-  'unpack',
-  'update',
-  'upper',
-  'using',
-  'value',
-  'when',
-  'while',
-  'window',
-  'write',
-  'where',
-  'with',
-  'work',
-  'at',
-  'case',
-  'catch',
-  'continue',
-  'do',
-  'elseif',
-  'else',
-  'endat',
-  'endcase',
-  'enddo',
-  'endif',
-  'endloop',
-  'endon',
-  'if',
-  'loop',
-  'on',
-  'raise',
-  'try',
-  'abs',
-  'sign',
-  'ceil',
-  'floor',
-  'trunc',
-  'frac',
-  'acos',
-  'asin',
-  'atan',
-  'cos',
-  'sin',
-  'tan',
-  'cosh',
-  'sinh',
-  'tanh',
-  'exp',
-  'log',
-  'log10',
-  'sqrt',
-  'strlen',
-  'xstrlen',
-  'charlen',
-  'lines',
-  'numofchar',
-  'dbmaxlen',
-  'round',
-  'rescale',
-  'nmax',
-  'nmin',
-  'cmax',
-  'cmin',
-  'boolc',
-  'boolx',
-  'xsdbool',
-  'contains',
-  'contains_any_of',
-  'contains_any_not_of',
-  'matches',
-  'line_exists',
-  'ipow',
-  'char_off',
-  'count',
-  'count_any_of',
-  'count_any_not_of',
-  'distance',
-  'condense',
-  'concat_lines_of',
-  'escape',
-  'find',
-  'find_end',
-  'find_any_of',
-  'find_any_not_of',
-  'insert',
-  'match',
-  'repeat',
-  'replace',
-  'reverse',
-  'segment',
-  'shift_left',
-  'shift_right',
-  'substring',
-  'substring_after',
-  'substring_from',
-  'substring_before',
-  'substring_to',
-  'to_upper',
-  'to_lower',
-  'to_mixed',
-  'from_mixed',
-  'translate',
-  'bit-set',
-  'line_index',
-  'definition',
-  'implementation',
-  'public',
-  'inheriting',
-  'final',
-];
-export var language = {
-  defaultToken: 'invalid',
-  ignoreCase: true,
-  tokenPostfix: '.abap',
-  keywords: abapKeywords,
-  typeKeywords: [
-    'abap_bool',
-    'string',
-    'xstring',
-    'any',
-    'clike',
-    'csequence',
-    'numeric',
-    'xsequence',
-    'c',
-    'n',
-    'i',
-    'p',
-    'f',
-    'd',
-    't',
-    'x',
-  ],
-  operators: [
-    '+',
-    '-',
-    '/',
-    '*',
-    '=',
-    '<',
-    '>',
-    '<=',
-    '>=',
-    '<>',
-    '><',
-    '=<',
-    '=>',
-    'EQ',
-    'NE',
-    'GE',
-    'LE',
-    'CS',
-    'CN',
-    'CA',
-    'CO',
-    'CP',
-    'NS',
-    'NA',
-    'NP',
-  ],
-  symbols: /[=><!~?&+\-*\/\^%]+/,
-  tokenizer: {
-    root: [
-      [
-        /[a-z_$][\w$]*/,
-        {
-          cases: {
-            '@typeKeywords': 'keyword',
-            '@keywords': 'keyword',
-            '@default': 'identifier',
-          },
-        },
-      ],
-      { include: '@whitespace' },
-      [/[:,.]/, 'delimiter'],
-      [/[{}()\[\]]/, '@brackets'],
-      [/@symbols/, { cases: { '@operators': 'operator', '@default': '' } }],
-      [/'/, { token: 'string', bracket: '@open', next: '@stringquote' }],
-      [/\|/, { token: 'string', bracket: '@open', next: '@stringtemplate' }],
-      [/\d+/, 'number'],
-    ],
-    stringtemplate: [
-      [/[^\\\|]+/, 'string'],
-      [/\\\|/, 'string'],
-      [/\|/, { token: 'string', bracket: '@close', next: '@pop' }],
-    ],
-    stringquote: [
-      [/[^\\']+/, 'string'],
-      [/'/, { token: 'string', bracket: '@close', next: '@pop' }],
-    ],
-    whitespace: [
-      [/[ \t\r\n]+/, ''],
-      [/^\*.*$/, 'comment'],
-      [/\".*$/, 'comment'],
-    ],
-  },
-};

src/routes/Edit.svelte

@@ -1,374 +0,0 @@
-<script>
-  import { onMount } from 'svelte';
-  import { codeStore, updateCode, updateCodeStore } from '../code-store.js';
-  import Editor from '../components/Editor.svelte';
-  import Config from '../components/Config.svelte';
-  import View from '../components/View.svelte';
-  import Card from '../components/Card.svelte';
-  import Tag from '../components/Tag.svelte';
-  import Links from '../components/Links.svelte';
-  import { fromUrl } from '../code-store.js';
-  // import pkg from '@mermaid-js/mermaid/package.json'
-  import pkg from '@mermaid/package.json';
-  import moment from 'moment';
-  export let mermaidVersion = pkg.version;
-  let historyList = [];
-  onMount(async () => {
-    ga('send', 'pageview');
-    ga('send', 'event', 'version', mermaidVersion, mermaidVersion);
-
-    const historyListKey = '_mermaid_history_';
-    historyList = JSON.parse(localStorage.getItem(historyListKey) || '[]');
-    let hisCode =
-      historyList.length > 0 ? historyList[historyList.length - 1] : null;
-
-    if (params.data) {
-      fromUrl(params.data);
-    } else if (hisCode) {
-      updateCodeStore({
-        code: hisCode.code,
-        mermaid: {},
-        updateEditor: true,
-      });
-    }
-
-    let code = null;
-    codeStore.subscribe((state) => {
-      code = (state && state.code) || code;
-    });
-
-    setInterval(() => {
-      if (code != hisCode) {
-        //save history
-        historyList.unshift({
-          time: new Date().toISOString(),
-          code: (hisCode = code),
-        });
-        if (historyList.length > 10) {
-          historyList.pop();
-        }
-        localStorage.setItem(historyListKey, JSON.stringify(historyList));
-      }
-      historyList = historyList; //triggered update
-    }, 1 * 60 * 1000);
-  });
-
-  // export let code = '';
-  // export let classes = '';
-  // export let error = {};
-  // export let token = '';
-  // export let expected = '';
-  export let params = {};
-  function loadFlowChart() {
-    loadSampleDiagram('FlowChart');
-  }
-  function loadSequenceDiagram() {
-    loadSampleDiagram('SequenceDiagram');
-  }
-  function loadClassDiagram() {
-    loadSampleDiagram('ClassDiagram');
-  }
-  function loadStateDiagram() {
-    loadSampleDiagram('StateDiagram');
-  }
-  function loadGanttChart() {
-    loadSampleDiagram('GanttChart');
-  }
-  function loadPieChart() {
-    loadSampleDiagram('PieChart');
-  }
-  function loadERDiagram() {
-    loadSampleDiagram('ERDiagram');
-  }
-  function loadSampleDiagram(diagramType) {
-    let code = '';
-    switch (diagramType) {
-      case 'FlowChart':
-        code = `graph TD
-    A[Christmas] -->|Get money| B(Go shopping)
-    B --> C{Let me think}
-    C -->|One| D[Laptop]
-    C -->|Two| E[iPhone]
-    C -->|Three| F[fa:fa-car Car]
-            `;
-        break;
-      case 'SequenceDiagram':
-        code = `sequenceDiagram
-    Alice->>+John: Hello John, how are you?
-    Alice->>+John: John, can you hear me?
-    John-->>-Alice: Hi Alice, I can hear you!
-    John-->>-Alice: I feel great!
-            `;
-        break;
-      case 'ClassDiagram':
-        code = `classDiagram
-    Animal <|-- Duck
-    Animal <|-- Fish
-    Animal <|-- Zebra
-    Animal : +int age
-    Animal : +String gender
-    Animal: +isMammal()
-    Animal: +mate()
-    class Duck{
-      +String beakColor
-      +swim()
-      +quack()
-    }
-    class Fish{
-      -int sizeInFeet
-      -canEat()
-    }
-    class Zebra{
-      +bool is_wild
-      +run()
-    }
-            `;
-        break;
-      case 'StateDiagram':
-        code = `stateDiagram-v2
-    [*] --> Still
-    Still --> [*]
-    Still --> Moving
-    Moving --> Still
-    Moving --> Crash
-    Crash --> [*]
-            `;
-        break;
-      case 'GanttChart':
-        code = `gantt
-    title A Gantt Diagram
-    dateFormat  YYYY-MM-DD
-    section Section
-    A task           :a1, 2014-01-01, 30d
-    Another task     :after a1  , 20d
-    section Another
-    Task in sec      :2014-01-12  , 12d
-    another task      : 24d
-            `;
-        break;
-      case 'PieChart':
-        code = `pie title Pets adopted by volunteers
-    "Dogs" : 386
-    "Cats" : 85
-    "Rats" : 15
-            `;
-        break;
-      case 'ERDiagram':
-        code = `erDiagram
-          CUSTOMER }|..|{ DELIVERY-ADDRESS : has
-          CUSTOMER ||--o{ ORDER : places
-          CUSTOMER ||--o{ INVOICE : "liable for"
-          DELIVERY-ADDRESS ||--o{ ORDER : receives
-          INVOICE ||--|{ ORDER : covers
-          ORDER ||--|{ ORDER-ITEM : includes
-          PRODUCT-CATEGORY ||--|{ PRODUCT : contains
-          PRODUCT ||--o{ ORDER-ITEM : "ordered in"
-            `;
-        break;
-    }
-    toUpdateCodeStore(code);
-  }
-
-  function toUpdateCodeStore(code) {
-    if (!code) return;
-    updateCode(code, true);
-  }
-
-  function relativeTime(t) {
-    return `${moment(t).fromNow()} (${new Date(t).toLocaleString()})`;
-  }
-</script>
-
-<style>
-  #body {
-    font-family: 'Roboto', sans-serif;
-    background-color: #fcfbfc;
-  }
-  #editor-root {
-    display: flex;
-    height: 100%;
-  }
-  #col1 {
-    width: 35%;
-  }
-  #col2 {
-    width: 65%;
-    padding-left: 32px;
-  }
-  #link-root {
-    display: flex;
-    height: fit-content;
-  }
-  #link-col1 {
-    width: 50%;
-  }
-  #link-col2 {
-    width: 50%;
-    padding-left: 32px;
-  }
-  #app-title {
-    font-family: 'Playfair Display', serif;
-    font-size: 32px;
-    font-weight: 700;
-    margin: 0;
-    color: #1e60ab;
-    opacity: 0.8;
-  }
-  #title-container {
-    width: fit-content;
-    margin: 0 auto 8px;
-  }
-  #power {
-    width: 100%;
-    display: flex;
-    justify-content: flex-end;
-    align-items: center;
-    height: 4rem;
-  }
-  #sampleLoader {
-    padding-left: 10px;
-    border-bottom: 1px solid lightgray;
-  }
-  #historyLoaderSubTitle {
-    display: inline-block;
-    color: #33a2c4;
-    font-size: small;
-    font-style: italic;
-  }
-  .button-container {
-    display: flex;
-    align-items: center;
-    flex-direction: row;
-    flex-wrap: wrap;
-  }
-  .button-style {
-    background-color: #a2d9e2;
-    color: #33a2c4;
-    border-radius: 0.25rem;
-    padding: 0.5rem;
-    border: 1px solid #a2d9e2;
-    margin: 0.25rem;
-  }
-  .button-style:hover {
-    background-color: #fff;
-    color: #33a2c4;
-    border: 1px solid #33a2c4;
-  }
-  .button-style:focus {
-    outline: none;
-  }
-  .link-style {
-    text-decoration: none;
-    color: #33a2c4;
-  }
-</style>
-
-<div id="body">
-  <div id="title-container">
-    <h1 id="app-title">Mermaid Live Editor</h1>
-  </div>
-  <div id="sampleLoader">
-    <div class="button-container">
-      <span id="sampleLoaderTitle"><strong>Diagram presets:</strong></span>
-      <button class="button-style" on:click={loadFlowChart}>
-        Flow Chart
-      </button>
-      <button class="button-style" on:click={loadSequenceDiagram}>
-        Sequence Diagram
-      </button>
-      <button class="button-style" on:click={loadClassDiagram}>
-        Class Diagram
-      </button>
-      <button class="button-style" on:click={loadStateDiagram}>
-        State Diagram
-      </button>
-      <button class="button-style" on:click={loadGanttChart}>
-        Gantt Chart
-      </button>
-      <button class="button-style" on:click={loadPieChart}> Pie Chart </button>
-      <button class="button-style" on:click={loadERDiagram}>
-        ER Diagram
-      </button>
-    </div>
-  </div>
-  <div id="editor-root">
-    <div id="col1">
-      <Card title="Code" noPadding="true">
-        <Editor data={params.data} />
-      </Card>
-      <Card title="Mermaid Configuration">
-        <Config />
-      </Card>
-    </div>
-    <div id="col2">
-      <Card title="Preview">
-        <View />
-      </Card>
-      <div id="link-root">
-        <div id="link-col1">
-          <Card title="Editing history">
-            <span id="historyLoaderSubTitle">Automatically saves once every
-              minute, up to 10 records.</span>
-            <br />
-            <div id="historyList" class="button-container">
-              {#if historyList.length > 0}
-                {#each historyList as item, i}
-                  <button
-                    class="button-style"
-                    on:click={(e) => toUpdateCodeStore(item.code)}>
-                    {relativeTime(item.time)}
-                  </button>
-                {/each}
-              {:else}No records.{/if}
-            </div>
-          </Card>
-          <Card title="Links">
-            <div class="button-container">
-              <button class="button-style">
-                <a
-                  href="https://mermaid-js.github.io/mermaid"
-                  target="_blank"
-                  class="link-style">
-                  Mermaid Documentation
-                </a>
-              </button>
-              <button class="button-style">
-                <a
-                  href="https://github.com/mermaid-js/mermaid"
-                  target="_blank"
-                  class="link-style">
-                  Mermaid on GitHub
-                </a>
-              </button>
-              <button class="button-style">
-                <a
-                  href="https://github.com/mermaid-js/mermaid-live-editor"
-                  target="_blank"
-                  class="link-style">
-                  Live Editor on GitHub
-                </a>
-              </button>
-              <button class="button-style">
-                <a
-                  href="https://github.com/mermaid-js/mermaid-cli"
-                  target="_blank"
-                  class="link-style">
-                  Mermaid CLI
-                </a>
-              </button>
-            </div>
-          </Card>
-        </div>
-        <div id="link-col2">
-          <Card title="Actions">
-            <Links />
-          </Card>
-        </div>
-      </div>
-    </div>
-  </div>
-  <div id="power">
-    Powered by mermaid
-    <Tag color="green">{mermaidVersion}</Tag>
-  </div>
-</div>

src/routes/View.svelte

@@ -1,30 +0,0 @@
-<script>
-  import { onMount } from 'svelte';
-  import Editor from '../components/Editor.svelte';
-  import View from '../components/View.svelte';
-  // import { fromUrl } from '../code-store.js';
-
-  onMount(async () => {
-    // fromUrl(params.data);
-    ga('send', 'pageview');
-  });
-
-  // export let code = '';
-  // export let classes = '';
-
-  // export let error = {};
-  // export let token = '';
-  // export let expected = '';
-  // export let params = {};
-</script>
-
-<style>
-  #view-page {
-    display: flex;
-    height: 100%;
-  }
-</style>
-
-<div id="view-page">
-  <View />
-</div>

src/routes/[fallback]/manifest.json.ts

@@ -0,0 +1,2 @@
+import { get as manifestGet } from '../manifest.json';
+export const get = manifestGet;

src/routes/__layout.svelte

@@ -0,0 +1,83 @@
+<script lang="ts">
+	import '../app.postcss';
+	import { base } from '$app/paths';
+	import { onMount } from 'svelte';
+	import { loadingStateStore } from '$lib/util/loading';
+	import { setTheme, themeStore } from '$lib/util/theme';
+	import { toggleDarkTheme } from '$lib/util/state';
+
+	// This can be removed once https://github.com/sveltejs/kit/issues/1612 is fixed.
+	// Then move it into src and vite will bundle it automatically.
+	onMount(() => {
+		if ('serviceWorker' in navigator) {
+			navigator.serviceWorker
+				.register(`${base}/service-worker.js`, {
+					scope: `${base}/`
+				})
+				.then(function (registration) {
+					console.log('Registration successful, scope is:', registration.scope);
+				})
+				.catch(function (error) {
+					console.log('Service worker registration failed, error:', error);
+				});
+		}
+
+		const isDarkMode = window.matchMedia('(prefers-color-scheme: dark)').matches;
+
+		if ($themeStore.theme === undefined) {
+			setTheme(isDarkMode ? 'dark' : 'light');
+		}
+
+		themeStore.subscribe(({ theme, isDark }) => {
+			if (theme) {
+				document.getElementsByTagName('html')[0].setAttribute('data-theme', theme);
+				toggleDarkTheme(isDark);
+			}
+		});
+	});
+</script>
+
+<main class="h-screen text-primary-content">
+	<slot />
+</main>
+
+{#if $loadingStateStore.loading}
+	<div
+		class="w-screen h-screen z-50 absolute left-0 top-0 bg-gray-600 opacity-50 flex align-middle justify-center">
+		<div class="text-indigo-100 text-4xl font-bold my-auto">
+			<div class="loader mx-auto" />
+			<div>{$loadingStateStore.message}</div>
+		</div>
+	</div>
+{/if}
+
+<style>
+	.loader {
+		border: 0.45em solid #f3f3f3;
+		border-radius: 50%;
+		border-top: 0.45em solid #6365f1;
+		width: 3em;
+		height: 3em;
+		-webkit-animation: spin 2s linear infinite; /* Safari */
+		animation: spin 2s linear infinite;
+	}
+
+	/* Safari */
+	@-webkit-keyframes spin {
+		0% {
+			-webkit-transform: rotate(0deg);
+		}
+		100% {
+			-webkit-transform: rotate(360deg);
+		}
+	}
+
+	@keyframes spin {
+		0% {
+			transform: rotate(0deg);
+		}
+		100% {
+			transform: rotate(360deg);
+		}
+	}
+</style>

src/routes/edit.svelte

@@ -0,0 +1,203 @@
+<script lang="ts">
+	import Editor from '$lib/components/editor/editor.svelte';
+	import Navbar from '$lib/components/navbar.svelte';
+	import Preset from '$lib/components/preset.svelte';
+	import Actions from '$lib/components/actions.svelte';
+	import View from '$lib/components/view.svelte';
+	import Card from '$lib/components/card/card.svelte';
+	import History from '$lib/components/history/history.svelte';
+	import { updateCode, updateConfig, codeStore, base64State } from '$lib/util/state';
+	import { initHandler, syncDiagram } from '$lib/util/util';
+	import { errorStore } from '$lib/util/error';
+	import { onMount } from 'svelte';
+	import mermaid from 'mermaid';
+	import type monaco from 'monaco-editor';
+	import type { EditorUpdateEvent, State, Tab } from '$lib/types';
+	import { base } from '$app/paths';
+
+	base64State; // Weird fix for error > base64State is not defined. Treeshaking?
+	let selectedMode = 'code';
+	const languageMap = {
+		code: 'mermaid',
+		config: 'json'
+	};
+	let text = '';
+	let language: 'mermaid' | 'json' = 'mermaid';
+	let errorMarkers: monaco.editor.IMarkerData[] = [];
+	$: language = languageMap[selectedMode];
+	$: {
+		if (selectedMode === 'code') {
+			text = $codeStore.code;
+		} else {
+			text = $codeStore.mermaid;
+		}
+	}
+
+	codeStore.subscribe((state: State) => {
+		if (state.updateEditor) {
+			text = selectedMode === 'code' ? state.code : state.mermaid;
+		}
+	});
+	const tabSelectHandler = (message: CustomEvent<Tab>) => {
+		$codeStore.updateEditor = true;
+		selectedMode = message.detail.id;
+	};
+	const tabs: Tab[] = [
+		{
+			id: 'code',
+			title: 'Code',
+			icon: 'fas fa-code'
+		},
+		{
+			id: 'config',
+			title: 'Config',
+			icon: 'fas fa-cogs'
+		}
+	];
+
+	const handleCodeUpdate = (code: string): void => {
+		mermaid.parse(code);
+		updateCode(code, false);
+	};
+
+	const handleConfigUpdate = (config: string): void => {
+		JSON.parse(config);
+		updateConfig(config, false);
+	};
+
+	const updateHandler = (message: CustomEvent<EditorUpdateEvent>) => {
+		try {
+			if (selectedMode === 'code') {
+				handleCodeUpdate(message.detail.text);
+			} else {
+				handleConfigUpdate(message.detail.text);
+			}
+			errorStore.set(undefined);
+			errorMarkers = [];
+		} catch (e) {
+			errorStore.set(e);
+			if (e.hash) {
+				const marker: monaco.editor.IMarkerData = {
+					severity: 8, //Error
+					startLineNumber: e.hash.loc.first_line,
+					startColumn: e.hash.loc.first_column,
+					endLineNumber: e.hash.loc.last_line,
+					endColumn: e.hash.loc.last_column + 1,
+					message: e.str
+				};
+				errorMarkers.push(marker);
+				// Clear all previous errors before this error.
+				errorMarkers = errorMarkers.filter(
+					(m) => m.startLineNumber >= marker.startLineNumber && m.startColumn >= marker.startColumn
+				);
+			}
+			console.error(e);
+		}
+	};
+
+	const viewDiagram = () => {
+		window.open(`${base}/view#${$base64State}`, '_blank').focus();
+	};
+
+	onMount(async () => {
+		await initHandler();
+		const resizer = document.getElementById('resizeHandler');
+		const element = document.getElementById('editorPane');
+		const resize = (e) => {
+			const newWidth = e.pageX - element.getBoundingClientRect().left;
+			if (newWidth > 50) {
+				element.style.width = `${newWidth}px`;
+			}
+		};
+
+		const stopResize = () => {
+			window.removeEventListener('mousemove', resize);
+		};
+		resizer.addEventListener('mousedown', (e) => {
+			e.preventDefault();
+			window.addEventListener('mousemove', resize);
+			window.addEventListener('mouseup', stopResize);
+		});
+	});
+</script>
+
+<div class="h-full flex flex-col overflow-hidden">
+	<Navbar />
+	<div class="flex-1 flex overflow-hidden">
+		<div class="hidden md:flex flex-col" id="editorPane" style="width: 40%">
+			<Card on:select={tabSelectHandler} {tabs} isCloseable={false} title="Mermaid">
+				<div slot="actions">
+					<div class="flex flex-row items-center">
+						{#if !$codeStore.autoSync}
+							<button
+								class="btn btn-secondary btn-xs"
+								title="Sync Diagram"
+								data-cy="sync"
+								on:click={syncDiagram}><i class="fas fa-sync" /></button>
+						{/if}
+
+						<div class="form-control">
+							<label class="cursor-pointer label" for="autoSync">
+								<input
+									type="checkbox"
+									class="toggle toggle-primary mr-1"
+									id="autoSync"
+									bind:checked={$codeStore.autoSync} />
+								<span> Auto sync</span>
+							</label>
+						</div>
+					</div>
+				</div>
+
+				<Editor on:update={updateHandler} {language} bind:text {errorMarkers} />
+			</Card>
+
+			<div class="-mt-2">
+				<Preset />
+				<History />
+				<Actions />
+			</div>
+		</div>
+		<div id="resizeHandler" class="hidden md:block" />
+		<div class="flex-1 flex flex-col overflow-hidden">
+			<Card title="Diagram" isCloseable={false}>
+				<button
+					slot="actions"
+					class="btn btn-primary btn-xs shadow-lg"
+					title="View diagram in new page"
+					on:click|stopPropagation={() => viewDiagram()}><i class="far fa-eye mr-2" /> View</button>
+
+				<div class="flex-1 overflow-auto">
+					<View />
+				</div>
+			</Card>
+			<div class="md:hidden rounded shadow p-2 mx-2">
+				Code editing not supported on mobile. Please use a desktop browser.
+			</div>
+		</div>
+	</div>
+</div>
+
+<style>
+	#resizeHandler {
+		cursor: col-resize;
+		padding: 0 2px;
+	}
+
+	#resizeHandler::after {
+		width: 2px;
+		height: 100%;
+		top: 0;
+		content: '';
+		position: absolute;
+		background-color: hsla(var(--b3));
+		margin-left: -1px;
+		transition-duration: 0.2s;
+	}
+
+	#resizeHandler:hover::after {
+		margin-left: -2px;
+		background-color: hsla(var(--p));
+		width: 4px;
+	}
+</style>

src/routes/index.svelte

@@ -0,0 +1,17 @@
+<script lang="ts">
+	import { goto } from '$app/navigation';
+	import { onMount } from 'svelte';
+	import { base } from '$app/paths';
+
+	onMount(async () => {
+		// Handle old live editor links and redirect to new version
+		const hash = window.location.hash.split('/');
+		let newURL = 'edit';
+		if (hash.length > 2) {
+			newURL = `${hash[1]}#${hash[2]}`;
+		}
+		await goto(`${base}/${newURL}`, {
+			replaceState: true
+		});
+	});
+</script>

src/routes/manifest.json.ts

@@ -0,0 +1,28 @@
+import { base } from '$app/paths';
+export const get = (): { body: unknown } => {
+	return {
+		body: {
+			short_name: 'Mermaid',
+			name: 'Mermaid Live Editor',
+			icons: [
+				{
+					src: `${base}/icon-192.png`,
+					type: 'image/png',
+					sizes: '192x192'
+				},
+				{
+					src: `${base}/icon-512.png`,
+					type: 'image/png',
+					sizes: '512x512'
+				}
+			],
+			start_url: `${base}/edit/`,
+			background_color: '#6366F1',
+			display: 'standalone',
+			scope: `${base}/edit/`,
+			theme_color: '#6366F1',
+			description: 'FlowChart & Diagrams Editor.',
+			orientation: 'landscape'
+		}
+	};
+};

src/routes/view.svelte

@@ -0,0 +1,8 @@
+<script lang="ts">
+	import View from '$lib/components/view.svelte';
+	import { initHandler } from '$lib/util/util';
+	import { onMount } from 'svelte';
+	onMount(initHandler);
+</script>
+
+<View />

static/robots.txt

@@ -0,0 +1,3 @@
+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
+Disallow:

static/service-worker.js

@@ -0,0 +1,2 @@
+// eslint-disable-next-line @typescript-eslint/no-empty-function
+self.addEventListener('fetch', () => {});