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

@@ -7,8 +7,17 @@ module.exports = {
 		// 'plugin:@typescript-eslint/recommended-requiring-type-checking',
 		'prettier'
 	],
-	plugins: ['svelte3', 'tailwindcss', '@typescript-eslint'],
-	ignorePatterns: ['docs/*', '*.cjs', '*.md', 'snapshots.js', 'svelte.config.js', 'package.json'],
+	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')
@@ -33,6 +42,7 @@ module.exports = {
 			}
 		],
 		'@typescript-eslint/no-unsafe-member-access': 'off',
-		'@typescript-eslint/no-unsafe-assignment': 'off'
+		'@typescript-eslint/no-unsafe-assignment': 'off',
+		'es/no-regexp-lookbehind-assertions': 'error'
 	}
 };

.github/dependabot.yml

@@ -1,8 +1,20 @@
 version: 2
 updates:
-  - package-ecosystem: 'npm'
-    directory: '/'
-    target-branch: 'develop'
+  - package-ecosystem: docker
+    directory: /
+    target-branch: develop
     schedule:
-      interval: 'weekly'
-      day: 'friday'
+      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/workflows/cypress.yml

@@ -9,6 +9,7 @@ on:
 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:

.github/workflows/deploy.yml

@@ -6,13 +6,14 @@ on:
   pull_request:
     branches:
       - master
+      - develop
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/setup-node@v2
         with:
-          node-version: '14'
+          node-version: '16'
 
       - name: Checkout
         uses: actions/checkout@v2
@@ -45,6 +46,7 @@ jobs:
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
+        if: ${{ github.ref == 'refs/heads/master' }}
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./docs

.github/workflows/stale.yml

@@ -8,7 +8,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v3
+      - uses: actions/stale@v4
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           exempt-issue-labels: 'retained'

Dockerfile

@@ -6,7 +6,7 @@
 # Stop               : press ctrl + c 
 #                                     or 
 #                                        docker stop mermaid-live-editor
-FROM node:14.17.0 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

@@ -1,4 +1,4 @@
-[![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)
+[![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!
 
@@ -17,7 +17,7 @@ Edit, preview and share mermaid charts/diagrams.
 
 ## 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
 

cypress/integration/actions.spec.ts

@@ -1,9 +1,7 @@
 describe('Check actions', () => {
-	// eslint-disable-next-line mocha/no-hooks-for-single-case
 	beforeEach(() => {
 		cy.clearLocalStorage();
 		cy.visit('/edit');
-		cy.contains('Actions').click();
 	});
 	it('should update markdown code', () => {
 		cy.get('#markdown')
@@ -17,4 +15,10 @@ describe('Check actions', () => {
 					});
 			});
 	});
+
+	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/history.spec.ts

@@ -1,8 +1,12 @@
 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');
@@ -43,7 +47,6 @@ describe('Save History', () => {
 	});
 
 	it('should auto save history', () => {
-		cy.clock();
 		cy.get('#editor').type('  C --> HistoryTest');
 		cy.tick(70000);
 		cy.contains('Timeline').click();

cypress/integration/loadSite.spec.ts

@@ -32,6 +32,35 @@ describe('Site Loads', () => {
 		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}`,

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/snapshots.js

@@ -4,10 +4,19 @@ module.exports = {
       "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\":false}"
+      "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": "8.2.0",
+  "__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}"
@@ -15,5 +24,29 @@ module.exports = {
     "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}"
+      }
+    }
   }
 }

package.json

@@ -15,45 +15,47 @@
 	},
 	"devDependencies": {
 		"@cypress/snapshot": "^2.1.7",
-		"@sveltejs/adapter-static": "1.0.0-next.16",
+		"@sveltejs/adapter-static": "1.0.0-next.19",
 		"@sveltejs/kit": "1.0.0-next.147",
 		"@types/mermaid": "^8.2.7",
-		"@typescript-eslint/eslint-plugin": "^4.29.2",
-		"@typescript-eslint/parser": "^4.29.2",
-		"autoprefixer": "^10.3.1",
+		"@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": "8.3.0",
+		"cypress": "8.4.0",
 		"cypress-localstorage-commands": "^1.5.0",
 		"eslint": "^7.32.0",
 		"eslint-config-prettier": "^8.1.0",
-		"eslint-plugin-cypress": "^2.11.3",
+		"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": "^3.2.0",
+		"eslint-plugin-svelte3": "^3.2.1",
 		"eslint-plugin-tailwindcss": "^1.14.3",
-		"husky": "^7.0.1",
+		"husky": "^7.0.2",
 		"lint-staged": "^11.1.2",
-		"mocha": "^9.1.0",
+		"mocha": "^9.1.1",
 		"postcss": "^8.3.6",
 		"postcss-load-config": "^3.1.0",
-		"prettier": "~2.3.2",
-		"prettier-plugin-svelte": "^2.3.1",
-		"svelte": "^3.42.2",
-		"svelte-preprocess": "^4.7.4",
-		"tailwindcss": "^2.2.7",
+		"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": "^4.3.5"
+		"typescript": "^4.4.3"
 	},
 	"type": "module",
 	"dependencies": {
 		"@analytics/google-analytics": "^0.5.3",
 		"@macfja/svelte-persistent-store": "^1.2.0",
-		"analytics": "^0.7.13",
-		"js-base64": "^3.6.1",
-		"mermaid": "^8.11.4",
+		"analytics": "^0.7.14",
+		"daisyui": "^1.14.0",
+		"js-base64": "^3.7.1",
+		"mermaid": "^8.12.1",
 		"moment": "^2.29.1",
-		"monaco-editor": "^0.25.2",
+		"monaco-editor": "^0.27.0",
 		"random-word-slugs": "^0.0.5"
 	},
 	"lint-staged": {

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.html

@@ -8,7 +8,7 @@
 			name="og:image"
 			content="https://github.com/mermaid-js/mermaid/raw/develop/img/header.png"
 		/>
-		<link rel="canonical" href="https://mermaid-js.github.io/mermaid-live-editor/" />
+		<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."
@@ -21,27 +21,27 @@
 		/>
 		<link
 			rel="stylesheet"
-			href="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.25.2/min/vs/editor/editor.main.min.css"
+			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/0.25.2/min/vs' }
+				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/0.25.2/min/vs/loader.min.js"
+			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/0.25.2/min/vs/editor/editor.main.nls.min.js"
+			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/0.25.2/min/vs/editor/editor.main.js"
+			src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.27.0/min/vs/editor/editor.main.js"
 			crossorigin="anonymous"
 			referrerpolicy="no-referrer"
 		></script>

src/app.postcss

@@ -2,13 +2,9 @@
 @tailwind components;
 @tailwind utilities;
 
-.nav-btn {
-	@apply lg:p-2 py-3 px-0 block border-b-2 border-transparent hover:border-white;
-}
-
-.btn {
-	@apply bg-indigo-500 hover:bg-indigo-700 rounded px-4 shadow;
+.input {
+	@apply flex-1 border-primary border-solid border-2 rounded;
 }
 .action-btn {
-	@apply rounded p-2 bg-indigo-400 shadow flex-auto text-white hover:bg-indigo-500;
+	@apply btn btn-primary;
 }

src/lib/components/actions.svelte

@@ -1,4 +1,6 @@
 <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';
@@ -105,17 +107,36 @@
 		);
 	};
 
-	const onCopyMarkdown = (event: Event) => {
-		event.target.select();
+	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') {
@@ -128,42 +149,77 @@
 	});
 </script>
 
-<Card title="Actions" isOpen={false}>
+<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" /> Copy Image to clipboard
+				><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" /> PNG
+			<i class="fas fa-download mr-2" /> PNG
 		</button>
 		<button class="action-btn flex-auto" on:click={onDownloadSVG}>
-			<i class="fas fa-download" /> SVG
+			<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" /> PNG</a>
+			<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" /> SVG</a>
+			<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
-			<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 type="radio" value="height" id="height-active" bind:group={imagemodeselected} />
-			<label for="height">Height</label>
+			<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" type="number" min="3" max="10000" bind:value={userimagesize} />
+				<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">
-			<label for="markdown">Copy Markdown</label>
-			<input class="flex-1" id="markdown" type="text" value={mdCode} on:click={onCopyMarkdown} />
+			<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

@@ -7,21 +7,22 @@
 	export let tabs: Tab[] = [];
 	export let title: string;
 	$: isOpen = isCloseable ? isOpen : true;
+	$: isTabsShown = isOpen && tabs.length > 0;
 </script>
 
-<div class="bg-white rounded overflow-hidden shadow m-2 flex-grow flex flex-col">
+<div class="card rounded overflow-hidden m-2 flex-grow flex flex-col shadow-2xl">
 	<div
-		class="bg-indigo-400 border-gray-400 p-2 flex-none cursor-pointer"
+		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 text-white">
+			<div class="flex gap-x-4 items-center {isTabsShown ? '-mt-2' : ''}">
 				<slot name="actions" />
 			</div>
 		</div>
 	</div>
 	{#if isOpen}
-		<div class="flex-grow overflow-auto" transition:slide>
+		<div class="card-body p-0 flex-grow overflow-auto text-base-content" transition:slide>
 			<slot />
 		</div>
 	{/if}

src/lib/components/card/tabs.svelte

@@ -7,7 +7,7 @@
 	export let title: string;
 	export let isOpen = false;
 
-	let activeTabID: string = tabs[0]?.id;
+	$: activeTabID = tabs[0]?.id;
 
 	const dispatch = createEventDispatcher<TabEvents>();
 	const toggleTabs = (tab: Tab) => {
@@ -17,25 +17,20 @@
 </script>
 
 <div class="flex cursor-default">
-	<span class="text-white mr-2 font-semibold" on:click|stopPropagation={() => (isOpen = !isOpen)}>
+	<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="flex flex-wrap flex-row" transition:fade>
+		<ul class="tabs" transition:fade>
 			{#each tabs as tab}
-				<li class="mr-2 last:mr-0 w-28 h-6 flex-auto text-center">
-					<div
-						class="text cursor-pointer font-semibold min-w-16 w-auto px-2 py-1 -mb-4 rounded-t  block leading-normal {activeTabID ===
-						tab.id
-							? 'text-indigo-500 bg-white border-white'
-							: 'text-white bg-indigo-500 border-indigo-500 hover:bg-indigo-600'}"
-						on:click|stopPropagation={() => toggleTabs(tab)}>
-						<i class={tab.icon} />
-						{tab.title}
-					</div>
-				</li>
+				<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}

src/lib/components/editor/editor.svelte

@@ -1,6 +1,7 @@
 <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';
@@ -14,11 +15,10 @@
 	export let editorOptions: monaco.editor.IStandaloneEditorConstructionOptions = {
 		value: text,
 		language: language,
-		scrollBeyondLastLine: false,
 		minimap: {
 			enabled: false
 		},
-		theme: 'myCoolTheme',
+		theme: 'mermaid',
 		overviewRulerLanes: 0
 	};
 	export let errorMarkers: monaco.editor.IMarkerData[] = [];
@@ -34,12 +34,16 @@
 		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.
+				// @ts-ignore : This is a hack to handle a svelte-kit error when importing monaco.
 				Monaco = monaco;
 				return;
 			} catch {
@@ -50,7 +54,7 @@
 	};
 	onMount(async () => {
 		try {
-			//@ts-ignore : This is a hack to handle a svelte-kit error when importing monaco.
+			// @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
@@ -63,7 +67,7 @@
 				text
 			});
 		});
-
+		Monaco?.editor.setTheme($themeStore.isDark ? 'mermaid-dark' : 'mermaid');
 		const resizeObserver = new ResizeObserver((entries) => {
 			editor.layout({
 				height: entries[0].contentRect.height,

src/lib/components/editor/util.ts

@@ -5,73 +5,545 @@
 export const initEditor = (monacoEditor): void => {
 	monacoEditor.languages.register({ id: 'mermaid' });
 
-	// Register a tokens provider for the language
-	monacoEditor.languages.setMonarchTokensProvider('mermaid', {
-		typeKeywords: [
-			'graph',
-			'stateDiagram',
-			'sequenceDiagram',
-			'classDiagram',
-			'pie',
-			'erDiagram',
-			'flowchart',
-			'gantt',
-			'gitGraph',
-			'journey'
-		],
-		keywords: ['participant', 'as'],
-		arrows: ['---', '===', '-->', '==>', '->>', '->'],
-		tokenizer: {
-			root: [
-				[/[{}]/, 'delimiter.bracket'],
-				[/[a-z_$][\w$]*/, { cases: { '@typeKeywords': 'keyword', '@keywords': 'keyword' } }],
-				[/[-=>ox]+/, { cases: { '@arrows': 'transition' } }],
-				[/[[{(}]+.+?[)\]}]+/, 'string'],
-				[/".*"/, 'string']
+	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'
 			]
 		},
-		whitespace: [
-			[/[ \t\r\n]+/, 'white'],
-			[/%%.*$/, 'comment']
+		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('myCoolTheme', {
+	monacoEditor.editor.defineTheme('mermaid', {
 		base: 'vs',
-		inherit: false,
+		inherit: true,
 		rules: [
-			{ token: 'keyword', foreground: '880000', fontStyle: 'bold' },
+			{ 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: '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 new language
+	// Register a completion item provider for the mermaid language
 	monacoEditor.languages.registerCompletionItemProvider('mermaid', {
 		provideCompletionItems: () => {
 			const suggestions = [
 				{
-					label: 'simpleText',
-					kind: monacoEditor.languages.CompletionItemKind.Text,
-					insertText: 'simpleText'
-				},
-				{
-					label: 'testing',
-					kind: monacoEditor.languages.CompletionItemKind.Keyword,
-					insertText: 'testing(${1:condition})',
-					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet
-				},
-				{
-					label: 'ifelse',
+					label: 'loop',
 					kind: monacoEditor.languages.CompletionItemKind.Snippet,
-					insertText: ['if (${1:condition}) {', '\t$0', '} else {', '\t', '}'].join('\n'),
+					insertText: ['loop ${1:Loop text}', '\t$0', 'end'].join('\n'),
 					insertTextRules: monacoEditor.languages.CompletionItemInsertTextRule.InsertAsSnippet,
-					documentation: 'If-Else Statement'
-				}
+					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

@@ -3,29 +3,30 @@
 	import { codeStore, getStateString } from '$lib/util/state';
 	import {
 		addHistoryEntry,
-		autoHistoryMode,
+		historyModeStore,
 		clearHistoryData,
 		getPreviousState,
-		historyStore
+		historyStore,
+		loaderHistoryStore
 	} from './history';
 	import { notify, prompt } from '$lib/util/notify';
 	import { onMount } from 'svelte';
 	import moment from 'moment';
-	import type { State, Tab } from '$lib/types';
+	import type { HistoryType, State, Tab } from '$lib/types';
 
 	const HISTORY_SAVE_INTERVAL = 60000;
 
 	const tabSelectHandler = (message: CustomEvent<Tab>) => {
-		autoHistoryMode.set('timeline' === message.detail.id);
+		historyModeStore.set(message.detail.id as HistoryType);
 	};
-	const tabs: Tab[] = [
+	let tabs: Tab[] = [
 		{
-			id: 'saved',
+			id: 'manual',
 			title: 'Saved',
 			icon: 'far fa-bookmark'
 		},
 		{
-			id: 'timeline',
+			id: 'auto',
 			title: 'Timeline',
 			icon: 'fas fa-history'
 		}
@@ -38,7 +39,7 @@
 			addHistoryEntry({
 				state: $codeStore,
 				time: Date.now(),
-				auto
+				type: auto ? 'auto' : 'manual'
 			});
 		} else if (!auto) {
 			notify('State already saved.');
@@ -62,52 +63,76 @@
 	};
 
 	onMount(() => {
-		autoHistoryMode.set(false);
+		historyModeStore.set('manual');
 		setInterval(() => {
 			saveHistory(true);
 		}, HISTORY_SAVE_INTERVAL);
 	});
 
-	let isOpen = true;
+	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"
+			class="btn btn-xs btn-success w-12"
 			on:click|stopPropagation={() => saveHistory()}
 			title="Save current state"><i class="far fa-save" /></button>
-		<button
-			id="clearHistory"
-			class="btn text-red-400"
-			on:click|stopPropagation={() => clearHistory()}
-			title="Delete all saved states"><i class="fas fa-trash-alt" /></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 }}
+			{#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">
-								<span>{name}</span>
+							<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="rounded px-2 w-24 bg-green-200 hover:bg-green-300"
-								on:click={() => restoreHistory(state)}><i class="fas fa-undo" /> Restore</button>
-							<button
-								class="rounded px-2 w-24 bg-red-200 hover:bg-red-300"
-								on:click={() => clearHistory(time)}><i class="fas fa-trash-alt" /> Delete</button>
+							<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 text-gray-600">
+			<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.

src/lib/components/history/history.ts

@@ -1,12 +1,13 @@
-import { derived, Readable, Writable, writable, get } from 'svelte/store';
+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 } from '../../types';
+import type { HistoryEntry, HistoryType } from '$lib/types';
 
 const MAX_AUTO_HISTORY_LENGTH = 30;
 
-export const autoHistoryMode: Writable<boolean> = persist(
-	writable(true),
+export const historyModeStore: Writable<HistoryType> = persist(
+	writable('manual'),
 	localStorage(),
 	'autoHistoryMode'
 );
@@ -23,17 +24,30 @@ const manualHistoryStore: Writable<HistoryEntry[]> = persist(
 	'manualHistoryStore'
 );
 
+export const loaderHistoryStore: Writable<HistoryEntry[]> = writable([] as HistoryEntry[]);
+
 export const historyStore: Readable<HistoryEntry[]> = derived(
-	[autoHistoryMode, autoHistoryStore, manualHistoryStore],
-	([autoMode, autoHistories, manualHistories], set) => {
-		set(autoMode ? autoHistories : manualHistories);
+	[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.auto) {
+	if (entry.type !== 'auto') {
 		manualHistoryStore.update((entries) => [entry, ...entries]);
 		return;
 	}
@@ -46,9 +60,12 @@ export const addHistoryEntry = (entry: HistoryEntry): void => {
 };
 
 export const clearHistoryData = (time?: number): void => {
-	(get(autoHistoryMode) ? autoHistoryStore : manualHistoryStore).update((entries) =>
-		entries.filter((entry) => time && entry.time != time)
-	);
+	(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 => {

src/lib/components/navbar.svelte

@@ -7,6 +7,8 @@
 </script>
 
 <script lang="ts">
+	import Theme from './theme.svelte';
+
 	interface Link {
 		title: string;
 		href: string;
@@ -37,11 +39,12 @@
 	];
 </script>
 
-<header class="p-2 bg-indigo-400 text-white font-bold flex flex-wrap items-center">
-	<div class="flex-1 flex justify-between items-center">
-		<a href="/">Mermaid<span class="text-xs font-thin">v{version}</span> Live Editor</a>
+<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 "
@@ -53,28 +56,27 @@
 		></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">
-		<nav>
-			<ul class="lg:flex items-center justify-between text-base pt-4 lg:pt-0">
-				{#each links as { title, href, icon }}
-					<li>
-						<a class="nav-btn" target="_blank" {href}>
-							{#if icon}
-								<i class={icon} />
-							{/if}
-							{title}</a>
-					</li>
-				{/each}
-			</ul>
-		</nav>
+		<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>
-</header>
+</div>
 
 <style>
 	#menu-toggle:checked + #menu {
 		display: block;
 	}
-	header {
+	.navbar {
 		z-index: 10000;
 	}
 </style>

src/lib/components/preset.svelte

@@ -108,7 +108,8 @@ merge newbranch
 <Card title="Sample Diagrams" isOpen={false}>
 	<div class="flex gap-2 flex-wrap p-2">
 		{#each Object.keys(samples) as sample}
-			<button class="action-btn" on:click={() => loadSampleDiagram(sample)}>{sample}</button>
+			<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

@@ -3,11 +3,12 @@
 
 	import { codeStore } from '$lib/util/state';
 	import { onMount } from 'svelte';
-	import * as mermaid from 'mermaid';
+	import mermaid from 'mermaid';
 
 	let code = '';
 	let config = '';
 	let container: HTMLDivElement;
+	let view: HTMLDivElement;
 	let error = false;
 	let outOfSync = false;
 	let manualUpdate = true;
@@ -26,13 +27,13 @@
 					}
 					code = state.code;
 					config = state.mermaid;
-					const scroll = container.parentElement.parentElement.parentElement.scrollTop;
+					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;
 					});
-					container.parentElement.parentElement.parentElement.scrollTop = scroll;
+					view.parentElement.scrollTop = scroll;
 					error = false;
 				} else if (manualUpdate) {
 					manualUpdate = false;
@@ -55,7 +56,7 @@
 	});
 </script>
 
-<div id="view" class="p-2" class:error class:outOfSync>
+<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>
 

src/lib/types.d.ts

@@ -29,11 +29,32 @@ export interface State {
 	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;
-	auto: boolean;
+	type: HistoryType;
+	url?: string;
 }
+
+type Loader = (url: string) => Promise<State>;

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/state.ts

@@ -2,9 +2,9 @@ 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 { saveStatistcs } from './stats';
+import { saveStatistics } from './stats';
 
-const defaultState: State = {
+export const defaultState: State = {
 	code: `graph TD
     A[Christmas] -->|Get money| B(Go shopping)
     B --> C{Let me think}
@@ -33,7 +33,7 @@ export const loadState = (data: string): void => {
 	let state: State;
 	try {
 		const stateStr = fromBase64(data);
-		console.log(`Tring to load state: ${stateStr}`);
+		console.log(`Trying to load state: ${stateStr}`);
 		state = JSON.parse(stateStr);
 		const mermaidConfig =
 			typeof state.mermaid === 'string' ? JSON.parse(state.mermaid) : state.mermaid;
@@ -66,12 +66,12 @@ export const updateCodeStore = (newState: State): void => {
 
 let prompted = false;
 export const updateCode = (code: string, updateEditor: boolean, updateDiagram = false): void => {
-	saveStatistcs(code);
+	saveStatistics(code);
 	const lines = (code.match(/\n/g) || '').length + 1;
 
 	if (lines > 50 && !prompted && get(codeStore).autoSync) {
 		const turnOff = confirm(
-			'Long diagram deteced. Turn off Auto Sync? Click the sync logo to manually sync.'
+			'Long diagram detected. Turn off Auto Sync? Click the sync logo to manually sync.'
 		);
 		prompted = true;
 		if (turnOff) {
@@ -92,6 +92,17 @@ export const updateConfig = (config: string, updateEditor: boolean): void => {
 	});
 };
 
+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}`);

src/lib/util/stats.ts

@@ -34,10 +34,10 @@ const detectType = (text: string): string => {
 
 // manual debounce
 let timeout;
-export const saveStatistcs = (graph: string): void => {
+export const saveStatistics = (graph: string): void => {
 	if (analytics) {
 		clearTimeout(timeout);
-		// Only save statistcs after a 5 sec delay
+		// Only save statistics after a 5 sec delay
 		timeout = setTimeout(function () {
 			const graphType = detectType(graph);
 			console.debug('ga:', 'send', 'event', 'render', graphType);

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

@@ -1,6 +1,8 @@
 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));
@@ -14,6 +16,7 @@ export const syncDiagram = (): void => {
 
 export const initHandler = async (): Promise<void> => {
 	loadStateFromURL();
+	await initLoading('Loading Gist...', loadDataFromUrl().catch(console.error));
 	syncDiagram();
 	initURLSubscription();
 	await initAnalytics();

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

@@ -2,6 +2,10 @@
 	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(() => {
@@ -17,9 +21,63 @@
 					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">
+<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

@@ -10,11 +10,12 @@
 	import { initHandler, syncDiagram } from '$lib/util/util';
 	import { errorStore } from '$lib/util/error';
 	import { onMount } from 'svelte';
-	import * as mermaid from 'mermaid';
+	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',
@@ -120,25 +121,32 @@
 	});
 </script>
 
-<div class="h-full flex flex-col overflow-hidden bg-gray-100">
+<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">
-					{#if !$codeStore.autoSync}
-						<button
-							class="bg-indigo-500 hover:bg-indigo-700 rounded px-4 mx-2"
-							title="Sync Diagram"
-							data-cy="sync"
-							on:click={syncDiagram}><i class="fas fa-sync" /></button>
-					{/if}
-					<label
-						for="autoSync"
-						style="white-space: nowrap;overflow: hidden;text-overflow: ellipsis;">
-						<input type="checkbox" id="autoSync" bind:checked={$codeStore.autoSync} />
-						Auto sync
-					</label>
+					<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} />
@@ -150,20 +158,20 @@
 				<Actions />
 			</div>
 		</div>
-		<div id="resizeHandler" />
+		<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"
+					class="btn btn-primary btn-xs shadow-lg"
 					title="View diagram in new page"
-					on:click|stopPropagation={() => viewDiagram()}><i class="far fa-eye" /> View</button>
+					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 bg-white rounded shadow p-2 mx-2">
+			<div class="md:hidden rounded shadow p-2 mx-2">
 				Code editing not supported on mobile. Please use a desktop browser.
 			</div>
 		</div>
@@ -182,19 +190,14 @@
 		top: 0;
 		content: '';
 		position: absolute;
-		background-color: #ccc;
+		background-color: hsla(var(--b3));
 		margin-left: -1px;
+		transition-duration: 0.2s;
 	}
 
 	#resizeHandler:hover::after {
 		margin-left: -2px;
-		background-color: #818cf8;
+		background-color: hsla(var(--p));
 		width: 4px;
 	}
-
-	@media screen and (max-width: 768px) {
-		#resizeHandler {
-			display: none;
-		}
-	}
 </style>

tailwind.config.cjs

@@ -1,21 +1,7 @@
-const { tailwindExtractor } = require('tailwindcss/lib/lib/purgeUnusedStyles');
-
 module.exports = {
-	mode: 'aot',
-	purge: {
-		content: ['./src/**/*.{html,js,svelte,ts}'],
-		options: {
-			defaultExtractor: (content) => [
-				// If this stops working, please open an issue at https://github.com/svelte-add/tailwindcss/issues rather than bothering Tailwind Labs about it
-				...tailwindExtractor(content),
-				// Match Svelte class: directives (https://github.com/tailwindlabs/tailwindcss/discussions/1731)
-				...[...content.matchAll(/(?:class:)*([\w\d-/:%.]+)/gm)].map(
-					([_match, group, ..._rest]) => group
-				)
-			]
-		},
-		safelist: [/^svelte-[\d\w]+$/]
-	},
+	mode: 'jit',
+	plugins: [require('daisyui')],
+	purge: ['./src/**/*.{html,js,svelte,ts}'],
 	theme: {
 		extend: {}
 	},

tsconfig.json

@@ -2,7 +2,7 @@
 	"compilerOptions": {
 		"moduleResolution": "node",
 		"module": "es2020",
-		"lib": ["es2020", "ESNext"],
+		"lib": ["es2020", "ESNext", "DOM.Iterable"],
 		"target": "es2019",
 		/**
 			svelte-preprocess cannot figure out whether you have a value or a type, so tell TypeScript