sample PW tests

Merge branch 'develop' into sidv/playwright
* develop: (174 commits) chore: cleanup fix: Error type chore: Bump node Show good error messages. chore: fix trailing slash chore(deps): update all non-major dependencies Block only tests snapshot Remove it.only fix #1103 chore(deps): update all non-major dependencies Update Browserslist chore: Update deps fix: Remove AsyncQueue Update Browserslist Fix #1089: Update monaco-mermaid chore(deps): update all non-major dependencies fix lint chore: Cleanup, fix theme fix: Snapshot, env types ...
2022-11-25 14:18:54 +05:30 · 2022-11-25 13:36:46 +05:30 · 2022-08-13 13:47:10 +05:30
44 changed files with 1731 additions and 1254 deletions
@@ -6,18 +6,9 @@ module.exports = {
    'plugin:@typescript-eslint/recommended',
    // 'plugin:@typescript-eslint/recommended-requiring-type-checking',
    'plugin:@typescript-eslint/strict',
-    'plugin:unicorn/recommended',
    'prettier'
  ],
-  plugins: [
-    'svelte3',
-    'tailwindcss',
-    '@typescript-eslint',
-    'es',
-    'vitest',
-    'no-only-tests',
-    'unicorn'
-  ],
+  plugins: ['svelte3', 'tailwindcss', '@typescript-eslint', 'es', 'vitest', 'no-only-tests'],
  ignorePatterns: [
    'docs/*',
    '*.cjs',
@@ -68,33 +59,6 @@ module.exports = {
    '@typescript-eslint/no-unsafe-assignment': 'off',
    'es/no-regexp-lookbehind-assertions': 'error',
    curly: ['error', 'all'],
-    'no-only-tests/no-only-tests': 'error',
-    'unicorn/no-null': 'off',
-    'unicorn/filename-case': [
-      'error',
-      {
-        case: 'camelCase'
-      }
-    ],
-    'unicorn/prevent-abbreviations': [
-      'error',
-      {
-        allowList: {
-          ctx: true,
-          db: true,
-          doc: true,
-          env: true,
-          fn: true,
-          i: true,
-          param: true,
-          req: true,
-          res: true,
-          str: true,
-          searchParams: true,
-          temp: true,
-          ImportMetaEnv: true
-        }
-      }
-    ]
+    'no-only-tests/no-only-tests': 'error'
  }
 };
@@ -0,0 +1,27 @@
+name: Playwright Tests
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+jobs:
+  test:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v2
+      with:
+        node-version: '14.x'
+    - name: Install dependencies
+      run: yarn
+    - name: Install Playwright Browsers
+      run: npx playwright install --with-deps
+    - name: Run Playwright tests
+      run: yarn playwright test
+    - uses: actions/upload-artifact@v2
+      if: always()
+      with:
+        name: playwright-report
+        path: playwright-report/
+        retention-days: 30
@@ -1,32 +1,18 @@
-name: Update Browserslist database
-
+name: Update Browserslist
 on:
-  schedule:
-    - cron: '0 2 1,15 * *'
-
-permissions:
-  contents: write
-  pull-requests: write
-
+  push:
+    branches-ignore:
+      - 'develop'
+      - 'master'
 jobs:
-  update-browserslist-database:
+  build:
    runs-on: ubuntu-latest
    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v3
+      - uses: actions/checkout@v3
+      - run: npx browserslist@latest --update-db
+      - name: Commit changes
+        uses: EndBug/add-and-commit@v9
        with:
-          fetch-depth: 0
-      - name: Configure git
-        run: |
-          git config --global user.email "action@github.com"
-          git config --global user.name "GitHub Action"
-      - name: Update Browserslist database and create PR if applies
-        uses: c2corg/browserslist-update-action@v2
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          branch: browserslist-update
-          base_branch: develop
-          commit_message: 'build: update Browserslist db'
-          title: 'build: update Browserslist db'
-          body: Auto-generated by [browserslist-update-action](https://github.com/c2corg/browserslist-update-action/)
-          labels: 'chores, github action'
+          author_name: ${{ github.actor }}
+          author_email: ${{ github.actor }}@users.noreply.github.com
+          message: 'Update Browserslist'
@@ -12,3 +12,6 @@ yarn-error.log
 /cypress/downloads
 /cypress/videos
 /cypress/screenshots
+/test-results/
+/playwright-report/
+/playwright/.cache/
@@ -1,20 +1,6 @@
 {
  "editor.formatOnSave": true,
-  "cSpell.words": [
-    "Browserslist",
-    "KROKI",
-    "Serde",
-    "asyncable",
-    "corg",
-    "cssnano",
-    "daisyui",
-    "esserializer",
-    "localstorage",
-    "mindmap",
-    "pako",
-    "serdes",
-    "tailwindcss"
-  ],
+  "cSpell.words": ["asyncable", "KROKI", "mindmap", "pako", "Serde", "serdes", "tailwindcss"],
  "vitest.commandLine": "yarn test:unit",
  "vitest.enable": true,
  "testing.autoRun.mode": "rerun",
@@ -6,7 +6,7 @@
 # Stop               : press ctrl + c 
 #                                     or 
 #                                        docker stop mermaid-live-editor
-FROM node:18.14.0 as mermaid-live-editor-builder 
+FROM node:18.12.1 as mermaid-live-editor-builder 
 COPY --chown=node:node . /home
 WORKDIR /home
 RUN yarn install
@@ -47,20 +47,17 @@ Then open http://localhost:8000

 ## Setup

-Below link will help you making a copy of the repository in your local system.
+[Volta](https://volta.sh) is used for managing node and yarn versions.

-https://docs.github.com/en/get-started/quickstart/fork-a-repo
+This project is set up using [Yarn](https://classic.yarnpkg.com/en/docs/getting-started):

-## Requirements
-
- [volta](https://volta.sh/) to manage node versions.
- [Node.js](https://nodejs.org/en/). `volta install node`
- [yarn](https://yarnpkg.com/) package manager. `volta install yarn`
+```
+yarn install
+```

 ## Development

-```sh
-yarn install
+```
 yarn dev -- --open
 ```

@@ -1,9 +1,8 @@
-import { verifyFileSizeGreaterThan } from './util';
+import { verifyFileSize } from './util';
 describe('Check actions', () => {
  beforeEach(() => {
    cy.clearLocalStorage();
    cy.visit('/edit');
-    cy.contains('Actions').click();
  });

  it('should update markdown code', () => {
@@ -19,7 +18,7 @@ describe('Check actions', () => {
      });
  });

-  it.skip('should load gists from URL', () => {
+  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!!');
@@ -29,20 +28,20 @@ describe('Check actions', () => {
    cy.clock(new Date(2022, 0, 1).getTime());

    cy.get(`#downloadPNG`).click();
-    verifyFileSizeGreaterThan('diagram', 'png', 35_000);
+    verifyFileSize('diagram', 'png', 21_000);

    cy.get(`#downloadSVG`).click();
-    verifyFileSizeGreaterThan('diagram', 'svg', 10_000);
+    verifyFileSize('diagram', 'svg', 10_000);

    // Verify downloaded file is different for different diagrams
    cy.contains('Sample Diagrams').click();
    cy.contains('ER').click();

    cy.get(`#downloadPNG`).click();
-    verifyFileSizeGreaterThan('diagram', 'png', 40_000);
+    verifyFileSize('diagram', 'png', 46_000);

    cy.get(`#downloadSVG`).click();
-    verifyFileSizeGreaterThan('diagram', 'svg', 11_000);
+    verifyFileSize('diagram', 'svg', 12_000);

    cy.clock().invoke('restore');
  });
@@ -49,7 +49,7 @@ describe('Auto sync tests', () => {
  });

  it('supports commenting code out/in', () => {
-    getEditor({ bottom: true, newline: false }).type(`{uparrow}${cmd}/`);
+    getEditor().type(`{uparrow}${cmd}/`);
    cy.get('#view').contains('Car').should('not.exist');

    getEditor().type(`{uparrow}${cmd}/`);
@@ -6,6 +6,7 @@ describe('Save History', () => {
    cy.clearLocalStorage();
    cy.visit('/edit');

+    cy.contains('Actions').click();
    cy.contains('History').click();
  });

@@ -23,6 +24,7 @@ describe('Save History', () => {
      '[{"state":{"code":"graph TD\\n    A[New Year] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":false},"time":0,"type":"auto","id":"69ea820e-522b-4a44-86cf-fd58acde09df","name":"barking-dog"},{"state":{"code":"graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)","mermaid":"{\\n  \\"theme\\": \\"dark\\"\\n}","autoSync":true,"updateDiagram":true},"time":0,"type":"manual","id":"x749ffc6-21dd-418a-b984-7c1ffc3146b3","name":"needy-mosquito"}]'
    );
    cy.reload();
+    cy.contains('Actions').click();
    cy.contains('History').click();
    cy.get('#historyList').find('li').should('have.length', 2);
    cy.get('#historyList').find('No items in History').should('not.exist');
@@ -82,15 +84,15 @@ describe('Save History', () => {
  // TODO: Fix #639
  xit('should auto save history', () => {
    getEditor().type('  C --> HistoryTest');
-    cy.tick(70_000);
+    cy.tick(70000);
    cy.contains('Timeline').click();
    cy.get('#historyList').find('li').should('have.length', 1);
    cy.get('#editor').type('ing');
-    cy.tick(70_000);
+    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(70_000);
+      cy.tick(70000);
    }
    cy.get('#historyList').find('li').should('have.length', 30);
  });
@@ -94,17 +94,6 @@ describe('Site Loads', () => {
    cy.contains('Please Click here to Raise an issue in github.');
  });

-  it('should load compressed URL', () => {
-    cy.visit(
-      '/edit#pako:eNpVkM2KwkAQhF-l6dMK5gVyEDRxvYi7sF6WjIcm0zqDzg_jBJEk725Hd2G3Tw31VVFUj23QjCWeEkUD-1p5kFs2O77BN1M6QFEshg1ncMHzfYDV2ybA1YQYrT_NXvhqgqDqtxPGkI315_ElVU__h-cB6mZLMYd4-Kvsb2GAdWM_jcT_V0xicb03RyqPVLSUoJI-OEfHyZHV0rqfDAqzYccKS3k1pbNC5Ufhuqgp81rbHBJKxuXKc6Quh6-7b7HMqeNfqLYkC7gfanwAlW1ZvQ'
-    );
-    cy.contains('New Year');
-    cy.visit(
-      '/edit#pako:eNptkU1PwzAMhv9K5BOI9Q9EXBDbJA477YYqITcxndV8QD40weh_Jy1rGR0-OY_tV2_sEyivCSQogzGuGduAtnaixINji0bcf1WVWGfVXdMtx8M1faYm4B8sxR27JLClJd6nwK4VLTlN4bI4jMQd2pLe3C4KFhNNcLQ92jv9ADGLNoTdozc-zIV4ZDsNlud7RtVN7_5Sb_jYrFcN3iN_0pPbEqUZK3QbTP_Ojyv4NdR4bwTHlyMbPcOQ3WJ2CliBpWCRdbnLqFJDOpClGmRJNYauhtr1pS-_6bKMjebkA8hXNJFWgDn5_YdTIFPINDWdb3vu6r8BaWOZRQ'
-    );
-    cy.contains('Animal');
-  });
-
  it('should load uncompressed URL', () => {
    cy.visit(
      '/edit/#eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW05ldyBZZWFyXSAtLT58R2V0IG1vbmV5fCBCKEdvIHNob3BwaW5nKVxuICAgIEIgLS0-IEN7TGV0IG1lIHRoaW5rfVxuICAgIEMgLS0-fE9uZXwgRFtMYXB0b3BdXG4gICAgQyAtLT58VHdvfCBFW2lQaG9uZV1cbiAgICBDIC0tPnxUaHJlZXwgRltmYTpmYS1jYXIgQ2FyXSIsIm1lcm1haWQiOiJ7XG4gIFwidGhlbWVcIjogXCJkZWZhdWx0XCJcbn0iLCJ1cGRhdGVFZGl0b3IiOmZhbHNlLCJhdXRvU3luYyI6dHJ1ZSwidXBkYXRlRGlhZ3JhbSI6ZmFsc2V9'
@@ -119,4 +108,15 @@ describe('Site Loads', () => {
    );
    cy.contains('New Year');
  });
+
+  it('should load compressed URL', () => {
+    cy.visit(
+      '/edit#pako:eNpVkM2KwkAQhF-l6dMK5gVyEDRxvYi7sF6WjIcm0zqDzg_jBJEk725Hd2G3Tw31VVFUj23QjCWeEkUD-1p5kFs2O77BN1M6QFEshg1ncMHzfYDV2ybA1YQYrT_NXvhqgqDqtxPGkI315_ElVU__h-cB6mZLMYd4-Kvsb2GAdWM_jcT_V0xicb03RyqPVLSUoJI-OEfHyZHV0rqfDAqzYccKS3k1pbNC5Ufhuqgp81rbHBJKxuXKc6Quh6-7b7HMqeNfqLYkC7gfanwAlW1ZvQ'
+    );
+    cy.contains('New Year');
+    cy.visit(
+      '/edit#pako:eNptkU1PwzAMhv9K5BOI9Q9EXBDbJA477YYqITcxndV8QD40weh_Jy1rGR0-OY_tV2_sEyivCSQogzGuGduAtnaixINji0bcf1WVWGfVXdMtx8M1faYm4B8sxR27JLClJd6nwK4VLTlN4bI4jMQd2pLe3C4KFhNNcLQ92jv9ADGLNoTdozc-zIV4ZDsNlud7RtVN7_5Sb_jYrFcN3iN_0pPbEqUZK3QbTP_Ojyv4NdR4bwTHlyMbPcOQ3WJ2CliBpWCRdbnLqFJDOpClGmRJNYauhtr1pS-_6bKMjebkA8hXNJFWgDn5_YdTIFPINDWdb3vu6r8BaWOZRQ'
+    );
+    cy.contains('Animal');
+  });
 });
@@ -10,7 +10,7 @@ export const getEditor = ({ bottom = true, newline = false } = {}) =>

 const downloadsFolder = Cypress.config('downloadsFolder');

-export const verifyFileSizeGreaterThan = (
+export const verifyFileSize = (
  fileType: 'history' | 'diagram',
  extension: string,
  size: number
@@ -21,10 +21,7 @@ export const verifyFileSizeGreaterThan = (
  cy.verifyDownload(fileName);
  cy.readFile(filePath, null, {
    log: false
-  }).then((buffer: ArrayBuffer) => {
-    expect(buffer.byteLength).to.be.gt(size);
-    expect(buffer.byteLength).to.be.lt(size * 1.3);
-  });
+  }).then((buffer) => expect((buffer as ArrayBuffer).byteLength).to.be.gt(size));
  cy.task('deleteFile', filePath);
 };

@@ -39,8 +36,8 @@ export const verifyFileSnapshot = (
  cy.verifyDownload(fileName);
  cy.readFile(filePath, null, {
    log: false
-  }).then((buffer: ArrayBuffer) =>
-    expect(new TextDecoder('utf8').decode(buffer)).to.contain(content)
+  }).then((buffer) =>
+    expect(new TextDecoder('utf-8').decode(buffer as ArrayBuffer)).to.contain(content)
  );
  cy.task('deleteFile', filePath);
 };
@@ -1,7 +1,7 @@
 module.exports = {
  "Site Loads": {
    "Check Home page load": {
-      "1": "{\"code\":\"flowchart 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}\",\"autoSync\":true,\"updateDiagram\":true}"
+      "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}\",\"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}\",\"autoSync\":true,\"updateDiagram\":true}"
@@ -19,10 +19,10 @@ module.exports = {
  "__version": "11.2.0",
  "Auto sync tests": {
    "should dim diagram when code is edited": {
-      "1": "{\"code\":\"flowchart 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}\",\"autoSync\":false,\"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]\\n    C --> Test\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"autoSync\":false,\"updateDiagram\":false}"
    },
    "should not dim diagram when code is in sync": {
-      "1": "{\"code\":\"flowchart 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}\",\"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]\\n    C --> Testing\",\"mermaid\":\"{\\n  \\\"theme\\\": \\\"default\\\"\\n}\",\"autoSync\":true,\"updateDiagram\":false}"
    }
  },
  "Test themes": {
@@ -1,7 +1,7 @@
 {
  "compilerOptions": {
    "allowJs": true,
-    "types": ["cypress", "cypress-localstorage-commands", "cy-verify-downloads", "node"]
+    "types": ["cypress", "cypress-localstorage-commands", "cy-verify-downloads"]
  },
  "include": ["**/*.ts"]
 }
@@ -19,61 +19,63 @@
    "test:coverage": "vitest run --coverage",
    "test:browser": "cypress run",
    "test": "test:unit && test:browser",
-    "cy": "cypress open"
+    "cy": "cypress open",
+    "pw": "npx playwright test"
  },
  "devDependencies": {
    "@cypress/snapshot": "2.1.7",
-    "@sveltejs/adapter-static": "1.0.6",
-    "@sveltejs/kit": "1.5.0",
+    "@playwright/test": "^1.28.1",
+    "@sveltejs/adapter-static": "1.0.0-next.48",
+    "@sveltejs/kit": "1.0.0-next.561",
    "@testing-library/jest-dom": "5.16.5",
    "@testing-library/svelte": "3.2.2",
    "@types/pako": "2.0.0",
    "@types/uuid": "8.3.4",
-    "@typescript-eslint/eslint-plugin": "5.51.0",
-    "@typescript-eslint/parser": "5.51.0",
-    "@vitest/ui": "^0.28.0",
+    "@typescript-eslint/eslint-plugin": "5.44.0",
+    "@typescript-eslint/parser": "5.44.0",
+    "@vitest/ui": "^0.25.3",
    "autoprefixer": "^10.4.13",
    "c8": "7.12.0",
    "chai": "^4.3.7",
    "cssnano": "^5.1.14",
    "cy-verify-downloads": "0.1.11",
    "cypress": "11.2.0",
-    "cypress-localstorage-commands": "2.2.2",
-    "eslint": "8.33.0",
-    "eslint-config-prettier": "8.6.0",
+    "cypress-localstorage-commands": "2.2.1",
+    "eslint": "8.28.0",
+    "eslint-config-prettier": "8.5.0",
    "eslint-plugin-cypress": "2.12.1",
    "eslint-plugin-es": "4.1.0",
    "eslint-plugin-no-only-tests": "^3.1.0",
    "eslint-plugin-postcss-modules": "2.0.0",
    "eslint-plugin-svelte3": "4.0.0",
-    "eslint-plugin-tailwindcss": "3.8.3",
-    "eslint-plugin-unicorn": "^45.0.0",
-    "eslint-plugin-vitest": "^0.0.32",
-    "esserializer": "1.3.10",
+    "eslint-plugin-tailwindcss": "3.7.0",
+    "eslint-plugin-vitest": "^0.0.20",
+    "esserializer": "1.3.5",
    "font-awesome": "^4.7.0",
    "husky": "^8.0.2",
    "jsdom": "20.0.3",
-    "lint-staged": "13.1.1",
+    "lint-staged": "13.0.3",
    "node-html-parser": "^6.1.4",
    "postcss": "^8.4.19",
    "postcss-load-config": "4.0.1",
-    "prettier": "2.8.3",
+    "prettier": "2.8.0",
    "prettier-plugin-svelte": "^2.8.1",
-    "svelte": "3.55.1",
+    "svelte": "3.53.1",
    "svelte-preprocess": "4.10.7",
    "tailwindcss": "^3.2.4",
    "tslib": "^2.4.1",
-    "typescript": "4.9.5",
-    "vite": "^4.0.1",
-    "vitest": "^0.28.0"
+    "typescript": "4.9.3",
+    "vite": "^3.2.4",
+    "vitest": "^0.25.3"
  },
  "dependencies": {
+    "@mermaid-js/mermaid-mindmap": "9.2.2",
    "analytics": "0.8.1",
    "analytics-plugin-plausible": "0.0.6",
-    "daisyui": "2.50.0",
-    "dayjs": "^1.11.7",
-    "js-base64": "3.7.4",
-    "mermaid": "10.0.1-rc.3",
+    "daisyui": "2.42.1",
+    "js-base64": "3.7.3",
+    "mermaid": "9.2.2",
+    "moment": "2.29.4",
    "monaco-editor": "0.34.1",
    "monaco-mermaid": "1.0.8",
    "pako": "2.1.0",
@@ -88,7 +90,7 @@
    ]
  },
  "volta": {
-    "node": "18.14.0",
+    "node": "18.12.1",
    "yarn": "1.22.19"
  },
  "engines": {
@@ -0,0 +1,106 @@
+import type { PlaywrightTestConfig } from '@playwright/test';
+import { devices } from '@playwright/test';
+
+/**
+ * Read environment variables from file.
+ * https://github.com/motdotla/dotenv
+ */
+// require('dotenv').config();
+
+/**
+ * See https://playwright.dev/docs/test-configuration.
+ */
+const config: PlaywrightTestConfig = {
+  testDir: './tests',
+  /* Maximum time one test can run for. */
+  timeout: 30 * 1000,
+  expect: {
+    /**
+     * Maximum time expect() should wait for the condition to be met.
+     * For example in `await expect(locator).toHaveText();`
+     */
+    timeout: 5000
+  },
+  /* Run tests in files in parallel */
+  fullyParallel: true,
+  /* Fail the build on CI if you accidentally left test.only in the source code. */
+  forbidOnly: !!process.env.CI,
+  /* Retry on CI only */
+  retries: process.env.CI ? 2 : 0,
+  /* Opt out of parallel tests on CI. */
+  workers: process.env.CI ? 1 : undefined,
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: 'html',
+  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
+  use: {
+    /* Maximum time each action such as `click()` can take. Defaults to 0 (no limit). */
+    actionTimeout: 0,
+    /* Base URL to use in actions like `await page.goto('/')`. */
+    baseURL: 'http://localhost:3000',
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry'
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: 'chromium',
+      use: {
+        ...devices['Desktop Chrome']
+      }
+    }
+
+    // {
+    //   name: 'firefox',
+    //   use: {
+    //     ...devices['Desktop Firefox'],
+    //   },
+    // },
+
+    // {
+    //   name: 'webkit',
+    //   use: {
+    //     ...devices['Desktop Safari'],
+    //   },
+    // },
+
+    /* Test against mobile viewports. */
+    // {
+    //   name: 'Mobile Chrome',
+    //   use: {
+    //     ...devices['Pixel 5'],
+    //   },
+    // },
+    // {
+    //   name: 'Mobile Safari',
+    //   use: {
+    //     ...devices['iPhone 12'],
+    //   },
+    // },
+
+    /* Test against branded browsers. */
+    // {
+    //   name: 'Microsoft Edge',
+    //   use: {
+    //     channel: 'msedge',
+    //   },
+    // },
+    // {
+    //   name: 'Google Chrome',
+    //   use: {
+    //     channel: 'chrome',
+    //   },
+    // },
+  ]
+
+  /* Folder for test artifacts such as screenshots, videos, traces, etc. */
+  // outputDir: 'test-results/',
+
+  /* Run your local dev server before starting the tests */
+  // webServer: {
+  //   command: 'npm run start',
+  //   port: 3000,
+  // },
+};
+
+export default config;
@@ -6,13 +6,13 @@
  import { stateStore } from '$lib/util/state';
  import { logEvent } from '$lib/util/stats';
  import { toBase64 } from 'js-base64';
-  import dayjs from 'dayjs';
+  import moment from 'moment';
  const { krokiRendererUrl, rendererUrl } = env;

  type Exporter = (context: CanvasRenderingContext2D, image: HTMLImageElement) => () => void;

  const getFileName = (ext: string) =>
-    `mermaid-diagram-${dayjs().format('YYYY-MM-DD-HHmmss')}.${ext}`;
+    `mermaid-diagram-${moment().format('YYYY-MM-DD-HHmmss')}.${ext}`;

  const getBase64SVG = (svg?: HTMLElement, width?: number, height?: number): string => {
    height && svg?.setAttribute('height', `${height}px`);
@@ -180,7 +180,7 @@
  });
 </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}
@@ -0,0 +1,3 @@
+// Vitest Snapshot v1
+
+exports[`card.svelte > mounts 1`] = `"<div><div class=\\"card rounded overflow-hidden m-2 flex-grow flex flex-col shadow-2xl\\"><div class=\\"bg-primary p-2 pb-0 flex-none cursor-pointer\\"><div class=\\"flex justify-between\\"><div class=\\"flex cursor-default s-lTROw8sJayZ1\\"><span class=\\"mr-2 font-semibold s-lTROw8sJayZ1\\"><i class=\\"fas fa-chevron-right icon s-lTROw8sJayZ1 isOpen\\"></i> TabTest</span> <ul class=\\"tabs s-lTROw8sJayZ1\\"><div class=\\"tab tab-lifted tab-active s-lTROw8sJayZ1\\"><i class=\\"mr-1 fab fa-git-alt s-lTROw8sJayZ1\\"></i> title1 </div><div class=\\"tab tab-lifted text-primary-content s-lTROw8sJayZ1\\"><i class=\\"mr-1 far fa-bookmark s-lTROw8sJayZ1\\"></i> title2 </div></ul></div><!--<Tabs>--> <div class=\\"flex gap-x-4 items-center -mt-2\\"></div></div></div> <div class=\\"card-body p-0 flex-grow overflow-auto text-base-content\\"></div></div><!--<Card>--></div>"`;
@@ -19,5 +19,6 @@ describe('card.svelte', () => {
    expect(container).toHaveTextContent('title1');
    expect(container).toHaveTextContent('title2');
    expect(container).not.toHaveTextContent('title3');
+    expect(container.innerHTML).toMatchSnapshot();
  });
 });
@@ -21,7 +21,7 @@
  let text = '';

  stateStore.subscribe(({ errorMarkers, editorMode, code, mermaid }) => {
-    // console.log('editor store subscription', { code, mermaid });
+    console.log('editor store subscription', { code, mermaid });
    if (!editor || !Monaco) {
      return;
    }
@@ -29,7 +29,7 @@
    // Update editor text if it's different
    const newText = editorMode === 'code' ? code : mermaid;
    if (newText !== text) {
-      // console.log('updating editor text', newText);
+      console.log('updating editor text', newText);
      editor.setValue(newText);
      text = newText;
    }
@@ -54,7 +54,7 @@
  });

  const handleUpdate = (text: string, mode: EditorMode) => {
-    // console.log('editor HandleUpdate', { text, mode });
+    console.log('editor HandleUpdate', { text, mode });
    if (mode === 'code') {
      updateCode(text);
    } else {
@@ -91,7 +91,7 @@
    editor = Monaco.editor.create(divEl, editorOptions);
    editor.onDidChangeModelContent(({ isFlush, changes }) => {
      const newText = editor?.getValue();
-      // console.log('editor onDidChangeModelContent', { text, newText, isFlush, changes });
+      console.log('editor onDidChangeModelContent', { text, newText, isFlush, changes });
      if (!newText || text === newText || isFlush) {
        return;
      }
@@ -120,9 +120,9 @@
    if (divEl.parentElement) {
      resizeObserver.observe(divEl.parentElement);
    }
-    // console.log(`editor mounted`);
+    console.log(`editor mounted`);
    return () => {
-      // console.log(`editor disposed`);
+      console.log(`editor disposed`);
      editor?.dispose();
    };
  });
@@ -13,13 +13,10 @@
  import { notify, prompt } from '$lib/util/notify';
  import { onMount } from 'svelte';
  import { get } from 'svelte/store';
-  import dayjs from 'dayjs';
-  import dayjsRelativeTime from 'dayjs/plugin/relativeTime';
+  import moment from 'moment';
  import type { HistoryEntry, HistoryType, State, Tab } from '$lib/types';
  import { logEvent } from '$lib/util/stats';

-  dayjs.extend(dayjsRelativeTime);
-
  const HISTORY_SAVE_INTERVAL = 60000;

  const tabSelectHandler = (message: CustomEvent<Tab>) => {
@@ -44,7 +41,7 @@
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
-    a.download = `mermaid-history-${dayjs().format('YYYY-MM-DD-HHmmss')}.json`;
+    a.download = `mermaid-history-${moment().format('YYYY-MM-DD-HHmmss')}.json`;
    a.click();
    URL.revokeObjectURL(url);
    logEvent('history', {
@@ -98,7 +95,7 @@

  const relativeTime = (time: number) => {
    const t = new Date(time);
-    return `${new Date(t).toLocaleString()} (${dayjs(t).fromNow()})`;
+    return `${new Date(t).toLocaleString()} (${moment(t).fromNow()})`;
  };

  onMount(() => {
@@ -17,7 +17,7 @@ describe('history', () => {

    addHistoryEntry({
      state: defaultState,
-      time: 12_345,
+      time: 12345,
      type: 'manual'
    });

@@ -25,14 +25,14 @@ describe('history', () => {
      window.localStorage.getItem('manualHistoryStore') ?? '[]'
    ) as HistoryEntry[];

-    expect(manualEntry.time).toBe(12_345);
+    expect(manualEntry.time).toBe(12345);
    expect(manualEntry.type).toBe('manual');
    expect(manualEntry.name).not.toBeNull();
    expect(manualEntry.state).not.toBeNull();

    addHistoryEntry({
      state: defaultState,
-      time: 54_321,
+      time: 54321,
      type: 'auto'
    });

@@ -40,7 +40,7 @@ describe('history', () => {
      window.localStorage.getItem('autoHistoryStore') ?? '[]'
    ) as HistoryEntry[];

-    expect(autoEntry.time).toBe(54_321);
+    expect(autoEntry.time).toBe(54321);
    expect(autoEntry.type).toBe('auto');
    expect(autoEntry.name).not.toBeNull();
    expect(autoEntry.state).not.toBeNull();
@@ -56,12 +56,12 @@ describe('history', () => {
  it('should clear history entries', () => {
    addHistoryEntry({
      state: defaultState,
-      time: 12_345,
+      time: 12345,
      type: 'manual'
    });
    addHistoryEntry({
      state: { ...defaultState, code: 'graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)' },
-      time: 123_456,
+      time: 123456,
      type: 'manual'
    });

@@ -76,12 +76,12 @@ describe('history', () => {
    historyModeStore.set('auto');
    addHistoryEntry({
      state: defaultState,
-      time: 54_321,
+      time: 54321,
      type: 'auto'
    });
    addHistoryEntry({
      state: { ...defaultState, code: 'graph TD\\n    A[Christmas] -->|Get money| B(Go shopping)' },
-      time: 654_321,
+      time: 654321,
      type: 'auto'
    });
    expect(get(historyStore).length).toBe(2);
@@ -26,27 +26,19 @@ const manualHistoryStore: Writable<HistoryEntry[]> = persist(
  'manualHistoryStore'
 );

-export const loaderHistoryStore: Writable<HistoryEntry[]> = writable([]);
+export const loaderHistoryStore: Writable<HistoryEntry[]> = writable([] as HistoryEntry[]);

 export const historyStore: Readable<HistoryEntry[]> = derived(
  [historyModeStore, autoHistoryStore, manualHistoryStore, loaderHistoryStore],
  ([historyMode, autoHistories, manualHistories, loadedHistories], set) => {
-    switch (historyMode) {
-      case 'auto': {
-        set(autoHistories);
-        break;
-      }
-      case 'manual': {
-        set(manualHistories);
-        break;
-      }
-      case 'loader': {
-        set(loadedHistories);
-        break;
-      }
-      default: {
-        set(autoHistories);
-      }
+    if (historyMode === 'auto') {
+      set(autoHistories);
+    } else if (historyMode === 'manual') {
+      set(manualHistories);
+    } else if (historyMode === 'loader') {
+      set(loadedHistories);
+    } else {
+      set(autoHistories);
    }
  }
 );
@@ -98,7 +90,7 @@ export const getPreviousState = (auto: boolean): string => {
 };

 export const restoreHistory = (data: HistoryEntry[]) => {
-  const entries = data.filter((element) => validateEntry(element));
+  const entries = data.filter(validateEntry);
  const invalidEntryCount = data.length - entries.length;
  if (invalidEntryCount > 0) {
    console.error(`${invalidEntryCount} invalid history entries were removed.`);
@@ -130,23 +122,20 @@ export const restoreHistory = (data: HistoryEntry[]) => {
    alert('No valid entries found.');
  }
 };
-const setIDs = (entries: HistoryEntry[]) => {
-  for (const entry of entries) {
-    if (!entry.id) {
-      entry.id = uuidV4();
-    }
-  }
-  return entries;
-};

 export const injectHistoryIDs = (): void => {
+  const setIDs = (entries: HistoryEntry[]) => {
+    for (const entry of entries) {
+      if (!entry.id) {
+        entry.id = uuidV4();
+      }
+    }
+    return entries;
+  };
  autoHistoryStore.update(setIDs);
  manualHistoryStore.update(setIDs);
 };

 const validateEntry = (entry: HistoryEntry): boolean => {
-  // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-  // @ts-expect-error
-  // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
  return entry.type && entry.state && entry.time && true;
 };
@@ -17,11 +17,11 @@
  const links: Link[] = [
    {
      title: 'Documentation',
-      href: 'https://mermaid-js.github.io/mermaid/intro/n00b-gettingStarted.html'
+      href: 'https://mermaid-js.github.io/mermaid/#/n00b-gettingStarted'
    },
    {
      title: 'Tutorial',
-      href: 'https://mermaid-js.github.io/mermaid/config/Tutorials.html'
+      href: 'https://github.com/mermaid-js/mermaid/blob/develop/docs/Tutorials.md'
    },
    {
      title: 'Mermaid',
@@ -4,7 +4,7 @@
  import { logEvent } from '$lib/util/stats';

  const samples = {
-    Flow: `flowchart TD
+    Flow: `graph TD
    A[Christmas] -->|Get money| B(Go shopping)
    B --> C{Let me think}
    C -->|One| D[Laptop]
@@ -79,27 +79,27 @@
        panZoomEnabled = state.panZoom;
        const scroll = view.parentElement!.scrollTop;
        delete container.dataset.processed;
-        const { svg, bindFunctions } = await renderDiagram(
+        await renderDiagram(
          Object.assign({}, JSON.parse(state.mermaid)) as MermaidConfig,
          code,
-          'graph-div'
+          'graph-div',
+          (svgCode, bindFunctions) => {
+            if (svgCode.length > 0) {
+              handlePanZoom(state);
+              container.innerHTML = svgCode;
+              // console.log(container.innerHTML);
+              const graphDiv = document.getElementById('graph-div');
+              if (!graphDiv) {
+                throw new Error('graph-div not found');
+              }
+              graphDiv.setAttribute('height', '100%');
+              graphDiv.style.maxWidth = '100%';
+              if (bindFunctions) {
+                bindFunctions(graphDiv);
+              }
+            }
+          }
        );
-
-        if (svg.length > 0) {
-          handlePanZoom(state);
-          container.innerHTML = svg;
-          console.log({ svg });
-          const graphDiv = document.getElementById('graph-div');
-          if (!graphDiv) {
-            throw new Error('graph-div not found');
-          }
-          graphDiv.setAttribute('height', '100%');
-          graphDiv.style.maxWidth = '100%';
-          if (bindFunctions) {
-            bindFunctions(graphDiv);
-          }
-        }
-
        view.parentElement!.scrollTop = scroll;
        error = false;
      } else if (manualUpdate) {
@@ -122,7 +122,7 @@
        pzoom.resize();
      }
    });
-    // console.log('View mounted');
+    console.log('View mounted');
  });
 </script>

@@ -133,7 +133,7 @@
      : 'text-yellow-600'} bg-base-100 bg-opacity-80 text-center"
    id="errorContainer">
    {#if error}
-      {@html $stateStore.error?.toString().replace(/\n/g, '<br />')}
+      {@html $stateStore.error.toString().replace(/\n/g, '<br />')}
    {:else}
      Diagram out of sync. <br />
      Press <i class="fas fa-sync" /> (Sync button) or <kbd>{cmdKey} + Enter</kbd> to sync.
@@ -65,7 +65,7 @@ export type HistoryEntry = { id: string; state: State; time: number; url?: strin
    }
 );

-export type DocumentationConfig = Record<
+export type DocConfig = Record<
  string,
  {
    code: string;
@@ -5,7 +5,6 @@
 import type { State } from '$lib/types';
 import { defaultState } from '$lib/util/state';
 import { addHistoryEntry } from '$lib/components/History/history';
-import { fetchJSON, fetchText } from '$lib/util/util';

 const codeFileName = 'code.mmd';
 const configFileName = 'config.json';
@@ -22,7 +21,7 @@ const isValidGist = (files: any): boolean => {

 const getFileContent = async (file: GithubFile): Promise<string> => {
  if (file.truncated) {
-    return await fetchText(file.raw_url);
+    return await (await fetch(file.raw_url)).text();
  }
  return file.content;
 };
@@ -50,9 +49,9 @@ const getGistData = async (gistURL: string): Promise<GistData> => {
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const [_, __, gistID, revisionID] = path.split('/');
  // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-  const { html_url, files, history }: GistResponse = await fetchJSON(
-    `https://api.github.com/gists/${gistID}${revisionID ? '/' + revisionID : ''}`
-  );
+  const { html_url, files, history }: GistResponse = await (
+    await fetch(`https://api.github.com/gists/${gistID}${revisionID ? '/' + revisionID : ''}`)
+  ).json();
  if (isValidGist(files)) {
    const code = await getFileContent(files[codeFileName]);
    let config = '{}';
@@ -97,12 +96,12 @@ export const loadGistData = async (gistURL: string): Promise<State> => {
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const [_, __, gistID, revisionID] = path.split('/');
  // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-  const { history }: GistResponse = await fetchJSON(
-    `https://api.github.com/gists/${gistID}${revisionID ? '/' + revisionID : ''}`
-  );
+  const { history }: GistResponse = await (
+    await fetch(`https://api.github.com/gists/${gistID}${revisionID ? '/' + revisionID : ''}`)
+  ).json();
  const gistHistory: GistData[] = [];
  for (const entry of history) {
-    const data: GistData | undefined = await getGistData(entry.url).catch();
+    const data: GistData | undefined = await getGistData(entry.url).catch(() => undefined);
    data && gistHistory.push(data);
  }
  if (gistHistory.length === 0) {
@@ -1,8 +1,6 @@
 import { loadGistData } from './gist';
-import { updateCodeStore, defaultState } from '$lib/util/state';
-import { fetchText } from '$lib/util/util';
+import { updateCodeStore, defaultState } from '../state';
 import type { Loader, State } from '$lib/types';
-
 const loaders: Record<string, Loader> = {
  gist: loadGistData
 };
@@ -10,18 +8,34 @@ const loaders: Record<string, Loader> = {
 export const loadDataFromUrl = async (): Promise<void> => {
  const searchParams = new URLSearchParams(window.location.search);
  let state: Partial<State> = defaultState;
+  let code: string | undefined = undefined;
+  let config: string | undefined = undefined;
  let loaded = false;
  const codeURL: string | undefined = searchParams.get('code') ?? undefined;
  const configURL: string | undefined = searchParams.get('config') ?? undefined;

-  let code: string | undefined;
-  const config = configURL ? await fetchText(configURL) : defaultState.mermaid;
-
  if (codeURL) {
-    code = await fetchText(codeURL);
+    code = await (await fetch(codeURL)).text();
    loaded = true;
  }
-  if (code) {
+  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 {
    if (!codeURL) {
      throw new Error('Code URL is not defined');
    }
@@ -36,18 +50,6 @@ export const loadDataFromUrl = async (): Promise<void> => {
        }
      }
    };
-  } else {
-    for (const [key, value] of searchParams.entries()) {
-      if (key in loaders) {
-        try {
-          state = await loaders[key](value);
-          loaded = true;
-          break;
-        } catch (error) {
-          console.error(error);
-        }
-      }
-    }
  }
  loaded &&
    updateCodeStore({
@@ -1,16 +1,27 @@
-import mermaid from 'mermaid';
-import type { MermaidConfig, RenderResult } from 'mermaid';
+import mermaid, { type MermaidConfig } from 'mermaid';
+import mindmap from '@mermaid-js/mermaid-mindmap';
+
+const initialize = mermaid.registerExternalDiagrams([mindmap]);
+
+export const init = async () => {
+  await initialize;
+};

 export const render = async (
  config: MermaidConfig,
  code: string,
-  id: string
-): Promise<RenderResult> => {
+  id: string,
+  callback: Parameters<typeof mermaid.render>[2]
+): Promise<void> => {
  // Should be able to call this multiple times without any issues.
  mermaid.initialize(config);
-  return await mermaid.render(id, code);
+  // console.log('Rendering', code);
+  // mermaid.mermaidAPI.render(id, code, callback);
+  await init();
+  await mermaid.mermaidAPI.renderAsync(id, code, callback);
 };

-export const parse = async (code: string): Promise<unknown> => {
-  return await mermaid.parse(code);
+export const parse = async (code: string): Promise<boolean> => {
+  await init();
+  return await mermaid.parseAsync(code);
 };
@@ -70,13 +70,13 @@ const deserialize = (value?: string | null): unknown => {
  if (value !== null && value !== undefined) {
    try {
      return ESSerializer.deserialize(value);
-    } catch {
+    } catch (e) {
      // Do nothing
      // use the value "as is"
    }
    try {
      return JSON.parse(value);
-    } catch {
+    } catch (e) {
      // Do nothing
      // use the value "as is"
    }
@@ -179,9 +179,11 @@ function getBrowserStorage(
  const listenerFunction = (event: StorageEvent) => {
    const eventKey = event.key;
    if (event.storageArea === browserStorage) {
-      for (const { listener } of listeners.filter(({ key }) => key === eventKey)) {
-        listener(deserialize(event.newValue));
-      }
+      listeners
+        .filter(({ key }) => key === eventKey)
+        .forEach(({ listener }) => {
+          listener(deserialize(event.newValue));
+        });
    }
  };
  const connect = () => {
@@ -3,29 +3,29 @@ import { serializeState, deserializeState, type SerdeType } from './serde';
 import { defaultState } from './state';
 import type { State } from '$lib/types';

-const verifySerde = (state: State, serde?: SerdeType): string => {
-  const serialized = serializeState(state, serde);
-  const deserialized = deserializeState(serialized);
-  expect(deserialized).to.deep.equal(state);
-  return serialized;
-};
-
 describe('Serde tests', () => {
+  const verifySerde = (state: State, serde?: SerdeType): string => {
+    const serialized = serializeState(state, serde);
+    const deserialized = deserializeState(serialized);
+    expect(deserialized).to.deep.equal(state);
+    return serialized;
+  };
+
  it('should serialize and deserialize with default serde', () => {
    expect(verifySerde(defaultState)).toMatchInlineSnapshot(
-      '"pako:eNpVjk2Lg0AMhv9KyGkL9Q94WGh1t5fCFurN6SFo7AztfDBGpKj_fcd62c0pvM_zhkzY-JYxx-7px0ZTFKhK5SDNoS50NL1Y6m-QZZ_ziQWsd_ya4fhx8tBrH4Jx993mH1cJium8agyijXssGyre_R_HM5T1mYL4cPtLqtHP8FWbi07n_xMdObW-647yjrKGIhQU3wru0XK0ZNr0_rQmCkWzZYV5WlvuaHiKQuWWpNIg_vpyDeYSB97jEFoSLg3dI9ktXH4B_cJWqw"'
+      '"pako:eNpVj81qw0AMhF9F6NRC_AI-BGK7zSXQQHLz5iBsObuk-8Naphjb7551fEl1EjPfiNGEjW8Zc7xHChqulXKQ5lCXOppeLPU3yLL9fGQB6x2PMxQfRw-99iEYd__c-GKFoJxOK8Yg2rjHslnlK__jeIaqPlEQH27vzvXPz_BVm7NO5_87OnJKfdcd5R1lDUUoKb4Q3KHlaMm0qfq0KgpFs2WFeVpb7mj4FYXKLQmlQfxldA3mEgfe4RBaEq4MpaftJi5PNtJU8w"'
    );
  });

  it('should serialize and deserialize with base64 serde', () => {
    expect(verifySerde(defaultState, 'base64')).toMatchInlineSnapshot(
-      '"base64:eyJjb2RlIjoiZmxvd2NoYXJ0IFREXG4gICAgQVtDaHJpc3RtYXNdIC0tPnxHZXQgbW9uZXl8IEIoR28gc2hvcHBpbmcpXG4gICAgQiAtLT4gQ3tMZXQgbWUgdGhpbmt9XG4gICAgQyAtLT58T25lfCBEW0xhcHRvcF1cbiAgICBDIC0tPnxUd298IEVbaVBob25lXVxuICAgIEMgLS0-fFRocmVlfCBGW2ZhOmZhLWNhciBDYXJdXG4gICIsIm1lcm1haWQiOiJ7XG4gIFwidGhlbWVcIjogXCJkZWZhdWx0XCJcbn0iLCJhdXRvU3luYyI6dHJ1ZSwidXBkYXRlRGlhZ3JhbSI6dHJ1ZX0"'
+      '"base64:eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW0NocmlzdG1hc10gLS0-fEdldCBtb25leXwgQihHbyBzaG9wcGluZylcbiAgICBCIC0tPiBDe0xldCBtZSB0aGlua31cbiAgICBDIC0tPnxPbmV8IERbTGFwdG9wXVxuICAgIEMgLS0-fFR3b3wgRVtpUGhvbmVdXG4gICAgQyAtLT58VGhyZWV8IEZbZmE6ZmEtY2FyIENhcl1cbiAgIiwibWVybWFpZCI6IntcbiAgXCJ0aGVtZVwiOiBcImRlZmF1bHRcIlxufSIsImF1dG9TeW5jIjp0cnVlLCJ1cGRhdGVEaWFncmFtIjp0cnVlfQ"'
    );
  });

  it('should serialize and deserialize with pako serde', () => {
    expect(verifySerde(defaultState, 'pako')).toMatchInlineSnapshot(
-      '"pako:eNpVjk2Lg0AMhv9KyGkL9Q94WGh1t5fCFurN6SFo7AztfDBGpKj_fcd62c0pvM_zhkzY-JYxx-7px0ZTFKhK5SDNoS50NL1Y6m-QZZ_ziQWsd_ya4fhx8tBrH4Jx993mH1cJium8agyijXssGyre_R_HM5T1mYL4cPtLqtHP8FWbi07n_xMdObW-647yjrKGIhQU3wru0XK0ZNr0_rQmCkWzZYV5WlvuaHiKQuWWpNIg_vpyDeYSB97jEFoSLg3dI9ktXH4B_cJWqw"'
+      '"pako:eNpVj81qw0AMhF9F6NRC_AI-BGK7zSXQQHLz5iBsObuk-8Naphjb7551fEl1EjPfiNGEjW8Zc7xHChqulXKQ5lCXOppeLPU3yLL9fGQB6x2PMxQfRw-99iEYd__c-GKFoJxOK8Yg2rjHslnlK__jeIaqPlEQH27vzvXPz_BVm7NO5_87OnJKfdcd5R1lDUUoKb4Q3KHlaMm0qfq0KgpFs2WFeVpb7mj4FYXKLQmlQfxldA3mEgfe4RBaEq4MpaftJi5PNtJU8w"'
    );
  });

@@ -2,28 +2,32 @@ import { writable, get, type Readable, derived } from 'svelte/store';
 import { persist, localStorage } from './persist';
 import { saveStatistics, countLines } from './stats';
 import { serializeState, deserializeState } from './serde';
-import { cmdKey, errorDebug, formatJSON } from './util';
+import { cmdKey, errorDebug } from './util';
 import { parse } from './mermaid';

 import type { ErrorHash, MarkerData, State, ValidatedState } from '$lib/types';
 import type { MermaidConfig } from 'mermaid';

 export const defaultState: State = {
-  code: `flowchart TD
+  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: formatJSON({
-    theme: 'default'
-  }),
+  mermaid: JSON.stringify(
+    {
+      theme: 'default'
+    },
+    null,
+    2
+  ),
  autoSync: true,
  updateDiagram: true
 };

-const urlParseFailedState = `flowchart TD
+const urlParseFailedState = `graph TD
    A[Loading URL failed. We can try to figure out why.] -->|Decode JSON| B(Please check the console to see the JSON and error details.)
    B --> C{Is the JSON correct?}
    C -->|Yes| D(Please Click here to Raise an issue in github.<br/>Including the broken link in the issue <br/> will speed up the fix.)
@@ -61,16 +65,16 @@ const processState = async (state: State) => {
    processed.serialized = serializeState(state);
    await parse(state.code);
    JSON.parse(state.mermaid);
-  } catch (error) {
-    processed.error = error as Error;
+  } catch (e) {
+    processed.error = e as Error;
    errorDebug();
-    console.error(error);
-    if ('hash' in error) {
+    console.error(e);
+    if ('hash' in e) {
      try {
        const {
          loc: { first_line, last_line, first_column, last_column }
          // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
-        } = error.hash as ErrorHash;
+        } = e.hash as ErrorHash;
        const marker: MarkerData = {
          severity: 8, // Error
          startLineNumber: first_line,
@@ -78,11 +82,11 @@ const processState = async (state: State) => {
          endLineNumber: last_line,
          endColumn: last_column + 1,
          // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access, @typescript-eslint/no-unsafe-assignment
-          message: error.str
+          message: e.str
        };
        processed.errorMarkers = [marker];
-      } catch (error) {
-        console.error('Error without line helper', error);
+      } catch (err) {
+        console.error('Error without line helper', err);
      }
    }
  }
@@ -116,11 +120,11 @@ export const loadState = (data: string): void => {
    ) {
      delete mermaidConfig.securityLevel; // Prevent setting overriding securityLevel when loading state to mitigate possible XSS attack
    }
-    state.mermaid = formatJSON(mermaidConfig);
-  } catch (error) {
+    state.mermaid = JSON.stringify(mermaidConfig, null, 2);
+  } catch (e) {
    state = get(inputStateStore);
    if (data) {
-      console.error('Init error', error);
+      console.error('Init error', e);
      state.code = urlParseFailedState;
      state.mermaid = defaultState.mermaid;
    }
@@ -142,7 +146,7 @@ export const updateCode = (
    resetPanZoom = false
  }: { updateDiagram?: boolean; resetPanZoom?: boolean } = {}
 ): void => {
-  // console.log('updateCode', code);
+  console.log('updateCode', code);
  const lines = countLines(code);
  saveStatistics(code);
  errorDebug();
@@ -168,7 +172,7 @@ export const updateCode = (
 };

 export const updateConfig = (config: string): void => {
-  // console.log('updateConfig', config);
+  console.log('updateConfig', config);
  inputStateStore.update((state) => {
    return { ...state, mermaid: config };
  });
@@ -181,7 +185,7 @@ export const toggleDarkTheme = (dark: boolean): void => {
      config.theme = dark ? 'dark' : 'default';
    }

-    return { ...state, mermaid: formatJSON(config) };
+    return { ...state, mermaid: JSON.stringify(config, null, 2) };
  });
 };

@@ -20,8 +20,8 @@ export const initAnalytics = async (): Promise<void> => {
          })
        ]
      });
-    } catch (error) {
-      console.log(error);
+    } catch (e) {
+      console.log(e);
      console.info('Analytics blocked ;)');
    }
  }
@@ -87,10 +87,10 @@ export const logEvent = (name: AnalyticsEvent, data?: unknown): void => {
    return;
  }
  const key = data ? JSON.stringify({ name, data }) : name;
-  if (timeouts.has(key)) {
-    clearTimeout(timeouts.get(key));
-  } else {
+  if (!timeouts.has(key)) {
    void analytics.track(name, data);
+  } else {
+    clearTimeout(timeouts.get(key));
  }
  timeouts.set(
    key,
@@ -16,7 +16,7 @@ export const themeStore: Writable<ThemeConfig> = persist(
  'themeStore'
 );

-const darkThemes = new Set([
+const darkThemes = [
  'dark',
  'synthwave',
  'halloween',
@@ -25,13 +25,13 @@ const darkThemes = new Set([
  'luxury',
  'black',
  'dracula'
-]);
+];

 export const setTheme = (theme: string): void => {
  if (theme.includes(' ')) {
    theme = theme.split(' ')[1].trim();
  }
-  const isDark = darkThemes.has(theme);
+  const isDark = darkThemes.includes(theme);
  console.log('Setting theme', theme);
  themeStore.set({ theme, isDark });
  logEvent('themeChange', { theme, isDark });
@@ -3,6 +3,7 @@ import { analytics, initAnalytics } from './stats';
 import { loadDataFromUrl } from './fileLoaders/loader';
 import { initLoading } from './loading';
 import { applyMigrations } from './migrations';
+import { init } from './mermaid';

 export const loadStateFromURL = (): void => {
  loadState(window.location.hash.slice(1));
@@ -16,6 +17,7 @@ export const syncDiagram = (): void => {

 export const initHandler = async (): Promise<void> => {
  applyMigrations();
+  await initLoading('Loading Mermaid...', init());
  loadStateFromURL();
  await initLoading('Loading Gist...', loadDataFromUrl().catch(console.error));
  syncDiagram();
@@ -36,13 +38,3 @@ export const errorDebug = (limit = 100) => {
    debugger;
  }
 };
-
-export const formatJSON = (data: unknown): string => JSON.stringify(data, undefined, 2);
-export const fetchJSON = async <T>(url: string): Promise<T> => {
-  const res = await fetch(url);
-  return res.json() as T;
-};
-export const fetchText = async (url: string): Promise<string> => {
-  const res = await fetch(url);
-  return res.text();
-};
@@ -9,11 +9,11 @@
  import { inputStateStore, stateStore, updateCodeStore } from '$lib/util/state';
  import { cmdKey, initHandler, syncDiagram } from '$lib/util/util';
  import { onMount } from 'svelte';
-  import type { Tab, DocumentationConfig, EditorMode, ValidatedState } from '$lib/types';
+  import type { Tab, DocConfig, EditorMode, ValidatedState } from '$lib/types';
  import { base } from '$app/paths';

  const docURLBase = 'https://mermaid-js.github.io/mermaid';
-  const docMap: DocumentationConfig = {
+  const docMap: DocConfig = {
    graph: {
      code: '/#/flowchart',
      config: '/#/flowchart?id=configuration'
@@ -54,12 +54,11 @@
  };
  let docURL = docURLBase;
  let activeTabID = 'code';
-  let docKey = '';
  stateStore.subscribe(({ code, editorMode }: ValidatedState) => {
    activeTabID = editorMode;
    const codeTypeMatch = /([\S]+)[\s\n]/.exec(code);
    if (codeTypeMatch && codeTypeMatch.length > 1) {
-      docKey = codeTypeMatch[1];
+      const docKey = codeTypeMatch[1];
      const docConfig = docMap[docKey] ?? { code: '' };
      docURL = docURLBase + (docConfig[editorMode] ?? docConfig.code ?? '');
    }
@@ -134,9 +133,7 @@
              on:click={syncDiagram}><i class="fas fa-sync" /></button>
          {/if}

-          <button
-            class="btn btn-secondary btn-xs"
-            title="View documentation for {docKey.replace('Diagram', '')} diagram">
+          <button class="btn btn-secondary btn-xs" title="View documentation">
            <a target="_blank" rel="noreferrer" href={docURL} data-cy="docs">
              <i class="fas fa-book mr-1" />Docs
            </a>
@@ -0,0 +1,398 @@
+import { test, expect, type Page } from '@playwright/test';
+
+test.beforeEach(async ({ page }) => {
+  await page.goto('https://demo.playwright.dev/todomvc');
+});
+
+const TODO_ITEMS = [
+  'buy some cheese',
+  'feed the cat',
+  'book a doctors appointment'
+];
+
+test.describe('New Todo', () => {
+  test('should allow me to add todo items', async ({ page }) => {
+    // Create 1st todo.
+    await page.locator('.new-todo').fill(TODO_ITEMS[0]);
+    await page.locator('.new-todo').press('Enter');
+
+    // Make sure the list only has one todo item.
+    await expect(page.locator('.view label')).toHaveText([
+      TODO_ITEMS[0]
+    ]);
+
+    // Create 2nd todo.
+    await page.locator('.new-todo').fill(TODO_ITEMS[1]);
+    await page.locator('.new-todo').press('Enter');
+
+    // Make sure the list now has two todo items.
+    await expect(page.locator('.view label')).toHaveText([
+      TODO_ITEMS[0],
+      TODO_ITEMS[1]
+    ]);
+
+    await checkNumberOfTodosInLocalStorage(page, 2);
+  });
+
+  test('should clear text input field when an item is added', async ({ page }) => {
+    // Create one todo item.
+    await page.locator('.new-todo').fill(TODO_ITEMS[0]);
+    await page.locator('.new-todo').press('Enter');
+
+    // Check that input is empty.
+    await expect(page.locator('.new-todo')).toBeEmpty();
+    await checkNumberOfTodosInLocalStorage(page, 1);
+  });
+
+  test('should append new items to the bottom of the list', async ({ page }) => {
+    // Create 3 items.
+    await createDefaultTodos(page);
+
+    // Check test using different methods.
+    await expect(page.locator('.todo-count')).toHaveText('3 items left');
+    await expect(page.locator('.todo-count')).toContainText('3');
+    await expect(page.locator('.todo-count')).toHaveText(/3/);
+
+    // Check all items in one call.
+    await expect(page.locator('.view label')).toHaveText(TODO_ITEMS);
+    await checkNumberOfTodosInLocalStorage(page, 3);
+  });
+
+  test('should show #main and #footer when items added', async ({ page }) => {
+    await page.locator('.new-todo').fill(TODO_ITEMS[0]);
+    await page.locator('.new-todo').press('Enter');
+
+    await expect(page.locator('.main')).toBeVisible();
+    await expect(page.locator('.footer')).toBeVisible();
+    await checkNumberOfTodosInLocalStorage(page, 1);
+  });
+});
+
+test.describe('Mark all as completed', () => {
+  test.beforeEach(async ({ page }) => {
+    await createDefaultTodos(page);
+    await checkNumberOfTodosInLocalStorage(page, 3);
+  });
+
+  test.afterEach(async ({ page }) => {
+    await checkNumberOfTodosInLocalStorage(page, 3);
+  });
+
+  test('should allow me to mark all items as completed', async ({ page }) => {
+    // Complete all todos.
+    await page.locator('.toggle-all').check();
+
+    // Ensure all todos have 'completed' class.
+    await expect(page.locator('.todo-list li')).toHaveClass(['completed', 'completed', 'completed']);
+    await checkNumberOfCompletedTodosInLocalStorage(page, 3);
+  });
+
+  test('should allow me to clear the complete state of all items', async ({ page }) => {
+    // Check and then immediately uncheck.
+    await page.locator('.toggle-all').check();
+    await page.locator('.toggle-all').uncheck();
+
+    // Should be no completed classes.
+    await expect(page.locator('.todo-list li')).toHaveClass(['', '', '']);
+  });
+
+  test('complete all checkbox should update state when items are completed / cleared', async ({ page }) => {
+    const toggleAll = page.locator('.toggle-all');
+    await toggleAll.check();
+    await expect(toggleAll).toBeChecked();
+    await checkNumberOfCompletedTodosInLocalStorage(page, 3);
+
+    // Uncheck first todo.
+    const firstTodo = page.locator('.todo-list li').nth(0);
+    await firstTodo.locator('.toggle').uncheck();
+
+    // Reuse toggleAll locator and make sure its not checked.
+    await expect(toggleAll).not.toBeChecked();
+
+    await firstTodo.locator('.toggle').check();
+    await checkNumberOfCompletedTodosInLocalStorage(page, 3);
+
+    // Assert the toggle all is checked again.
+    await expect(toggleAll).toBeChecked();
+  });
+});
+
+test.describe('Item', () => {
+
+  test('should allow me to mark items as complete', async ({ page }) => {
+    // Create two items.
+    for (const item of TODO_ITEMS.slice(0, 2)) {
+      await page.locator('.new-todo').fill(item);
+      await page.locator('.new-todo').press('Enter');
+    }
+
+    // Check first item.
+    const firstTodo = page.locator('.todo-list li').nth(0);
+    await firstTodo.locator('.toggle').check();
+    await expect(firstTodo).toHaveClass('completed');
+
+    // Check second item.
+    const secondTodo = page.locator('.todo-list li').nth(1);
+    await expect(secondTodo).not.toHaveClass('completed');
+    await secondTodo.locator('.toggle').check();
+
+    // Assert completed class.
+    await expect(firstTodo).toHaveClass('completed');
+    await expect(secondTodo).toHaveClass('completed');
+  });
+
+  test('should allow me to un-mark items as complete', async ({ page }) => {
+    // Create two items.
+    for (const item of TODO_ITEMS.slice(0, 2)) {
+      await page.locator('.new-todo').fill(item);
+      await page.locator('.new-todo').press('Enter');
+    }
+
+    const firstTodo = page.locator('.todo-list li').nth(0);
+    const secondTodo = page.locator('.todo-list li').nth(1);
+    await firstTodo.locator('.toggle').check();
+    await expect(firstTodo).toHaveClass('completed');
+    await expect(secondTodo).not.toHaveClass('completed');
+    await checkNumberOfCompletedTodosInLocalStorage(page, 1);
+
+    await firstTodo.locator('.toggle').uncheck();
+    await expect(firstTodo).not.toHaveClass('completed');
+    await expect(secondTodo).not.toHaveClass('completed');
+    await checkNumberOfCompletedTodosInLocalStorage(page, 0);
+  });
+
+  test('should allow me to edit an item', async ({ page }) => {
+    await createDefaultTodos(page);
+
+    const todoItems = page.locator('.todo-list li');
+    const secondTodo = todoItems.nth(1);
+    await secondTodo.dblclick();
+    await expect(secondTodo.locator('.edit')).toHaveValue(TODO_ITEMS[1]);
+    await secondTodo.locator('.edit').fill('buy some sausages');
+    await secondTodo.locator('.edit').press('Enter');
+
+    // Explicitly assert the new text value.
+    await expect(todoItems).toHaveText([
+      TODO_ITEMS[0],
+      'buy some sausages',
+      TODO_ITEMS[2]
+    ]);
+    await checkTodosInLocalStorage(page, 'buy some sausages');
+  });
+});
+
+test.describe('Editing', () => {
+  test.beforeEach(async ({ page }) => {
+    await createDefaultTodos(page);
+    await checkNumberOfTodosInLocalStorage(page, 3);
+  });
+
+  test('should hide other controls when editing', async ({ page }) => {
+    const todoItem = page.locator('.todo-list li').nth(1);
+    await todoItem.dblclick();
+    await expect(todoItem.locator('.toggle')).not.toBeVisible();
+    await expect(todoItem.locator('label')).not.toBeVisible();
+    await checkNumberOfTodosInLocalStorage(page, 3);
+  });
+
+  test('should save edits on blur', async ({ page }) => {
+    const todoItems = page.locator('.todo-list li');
+    await todoItems.nth(1).dblclick();
+    await todoItems.nth(1).locator('.edit').fill('buy some sausages');
+    await todoItems.nth(1).locator('.edit').dispatchEvent('blur');
+
+    await expect(todoItems).toHaveText([
+      TODO_ITEMS[0],
+      'buy some sausages',
+      TODO_ITEMS[2],
+    ]);
+    await checkTodosInLocalStorage(page, 'buy some sausages');
+  });
+
+  test('should trim entered text', async ({ page }) => {
+    const todoItems = page.locator('.todo-list li');
+    await todoItems.nth(1).dblclick();
+    await todoItems.nth(1).locator('.edit').fill('    buy some sausages    ');
+    await todoItems.nth(1).locator('.edit').press('Enter');
+
+    await expect(todoItems).toHaveText([
+      TODO_ITEMS[0],
+      'buy some sausages',
+      TODO_ITEMS[2],
+    ]);
+    await checkTodosInLocalStorage(page, 'buy some sausages');
+  });
+
+  test('should remove the item if an empty text string was entered', async ({ page }) => {
+    const todoItems = page.locator('.todo-list li');
+    await todoItems.nth(1).dblclick();
+    await todoItems.nth(1).locator('.edit').fill('');
+    await todoItems.nth(1).locator('.edit').press('Enter');
+
+    await expect(todoItems).toHaveText([
+      TODO_ITEMS[0],
+      TODO_ITEMS[2],
+    ]);
+  });
+
+  test('should cancel edits on escape', async ({ page }) => {
+    const todoItems = page.locator('.todo-list li');
+    await todoItems.nth(1).dblclick();
+    await todoItems.nth(1).locator('.edit').press('Escape');
+    await expect(todoItems).toHaveText(TODO_ITEMS);
+  });
+});
+
+test.describe('Counter', () => {
+  test('should display the current number of todo items', async ({ page }) => {
+    await page.locator('.new-todo').fill(TODO_ITEMS[0]);
+    await page.locator('.new-todo').press('Enter');
+    await expect(page.locator('.todo-count')).toContainText('1');
+
+    await page.locator('.new-todo').fill(TODO_ITEMS[1]);
+    await page.locator('.new-todo').press('Enter');
+    await expect(page.locator('.todo-count')).toContainText('2');
+
+    await checkNumberOfTodosInLocalStorage(page, 2);
+  });
+});
+
+test.describe('Clear completed button', () => {
+  test.beforeEach(async ({ page }) => {
+    await createDefaultTodos(page);
+  });
+
+  test('should display the correct text', async ({ page }) => {
+    await page.locator('.todo-list li .toggle').first().check();
+    await expect(page.locator('.clear-completed')).toHaveText('Clear completed');
+  });
+
+  test('should remove completed items when clicked', async ({ page }) => {
+    const todoItems = page.locator('.todo-list li');
+    await todoItems.nth(1).locator('.toggle').check();
+    await page.locator('.clear-completed').click();
+    await expect(todoItems).toHaveCount(2);
+    await expect(todoItems).toHaveText([TODO_ITEMS[0], TODO_ITEMS[2]]);
+  });
+
+  test('should be hidden when there are no items that are completed', async ({ page }) => {
+    await page.locator('.todo-list li .toggle').first().check();
+    await page.locator('.clear-completed').click();
+    await expect(page.locator('.clear-completed')).toBeHidden();
+  });
+});
+
+test.describe('Persistence', () => {
+  test('should persist its data', async ({ page }) => {
+    for (const item of TODO_ITEMS.slice(0, 2)) {
+      await page.locator('.new-todo').fill(item);
+      await page.locator('.new-todo').press('Enter');
+    }
+
+    const todoItems = page.locator('.todo-list li');
+    await todoItems.nth(0).locator('.toggle').check();
+    await expect(todoItems).toHaveText([TODO_ITEMS[0], TODO_ITEMS[1]]);
+    await expect(todoItems).toHaveClass(['completed', '']);
+
+    // Ensure there is 1 completed item.
+    checkNumberOfCompletedTodosInLocalStorage(page, 1);
+
+    // Now reload.
+    await page.reload();
+    await expect(todoItems).toHaveText([TODO_ITEMS[0], TODO_ITEMS[1]]);
+    await expect(todoItems).toHaveClass(['completed', '']);
+  });
+});
+
+test.describe('Routing', () => {
+  test.beforeEach(async ({ page }) => {
+    await createDefaultTodos(page);
+    // make sure the app had a chance to save updated todos in storage
+    // before navigating to a new view, otherwise the items can get lost :(
+    // in some frameworks like Durandal
+    await checkTodosInLocalStorage(page, TODO_ITEMS[0]);
+  });
+
+  test('should allow me to display active items', async ({ page }) => {
+    await page.locator('.todo-list li .toggle').nth(1).check();
+    await checkNumberOfCompletedTodosInLocalStorage(page, 1);
+    await page.locator('.filters >> text=Active').click();
+    await expect(page.locator('.todo-list li')).toHaveCount(2);
+    await expect(page.locator('.todo-list li')).toHaveText([TODO_ITEMS[0], TODO_ITEMS[2]]);
+  });
+
+  test('should respect the back button', async ({ page }) => {
+    await page.locator('.todo-list li .toggle').nth(1).check();
+    await checkNumberOfCompletedTodosInLocalStorage(page, 1);
+
+    await test.step('Showing all items', async () => {
+      await page.locator('.filters >> text=All').click();
+      await expect(page.locator('.todo-list li')).toHaveCount(3);
+    });
+
+    await test.step('Showing active items', async () => {
+      await page.locator('.filters >> text=Active').click();
+    });
+
+    await test.step('Showing completed items', async () => {
+      await page.locator('.filters >> text=Completed').click();
+    });
+
+    await expect(page.locator('.todo-list li')).toHaveCount(1);
+    await page.goBack();
+    await expect(page.locator('.todo-list li')).toHaveCount(2);
+    await page.goBack();
+    await expect(page.locator('.todo-list li')).toHaveCount(3);
+  });
+
+  test('should allow me to display completed items', async ({ page }) => {
+    await page.locator('.todo-list li .toggle').nth(1).check();
+    await checkNumberOfCompletedTodosInLocalStorage(page, 1);
+    await page.locator('.filters >> text=Completed').click();
+    await expect(page.locator('.todo-list li')).toHaveCount(1);
+  });
+
+  test('should allow me to display all items', async ({ page }) => {
+    await page.locator('.todo-list li .toggle').nth(1).check();
+    await checkNumberOfCompletedTodosInLocalStorage(page, 1);
+    await page.locator('.filters >> text=Active').click();
+    await page.locator('.filters >> text=Completed').click();
+    await page.locator('.filters >> text=All').click();
+    await expect(page.locator('.todo-list li')).toHaveCount(3);
+  });
+
+  test('should highlight the currently applied filter', async ({ page }) => {
+    await expect(page.locator('.filters >> text=All')).toHaveClass('selected');
+    await page.locator('.filters >> text=Active').click();
+    // Page change - active items.
+    await expect(page.locator('.filters >> text=Active')).toHaveClass('selected');
+    await page.locator('.filters >> text=Completed').click();
+    // Page change - completed items.
+    await expect(page.locator('.filters >> text=Completed')).toHaveClass('selected');
+  });
+});
+
+async function createDefaultTodos(page: Page) {
+  for (const item of TODO_ITEMS) {
+    await page.locator('.new-todo').fill(item);
+    await page.locator('.new-todo').press('Enter');
+  }
+}
+
+async function checkNumberOfTodosInLocalStorage(page: Page, expected: number) {
+  return await page.waitForFunction(e => {
+    return JSON.parse(localStorage['react-todos']).length === e;
+  }, expected);
+}
+
+async function checkNumberOfCompletedTodosInLocalStorage(page: Page, expected: number) {
+  return await page.waitForFunction(e => {
+    return JSON.parse(localStorage['react-todos']).filter((todo: any) => todo.completed).length === e;
+  }, expected);
+}
+
+async function checkTodosInLocalStorage(page: Page, title: string) {
+  return await page.waitForFunction(t => {
+    return JSON.parse(localStorage['react-todos']).map((todo: any) => todo.title).includes(t);
+  }, title);
+}
@@ -0,0 +1,179 @@
+import { toBase64 } from 'js-base64';
+
+// describe('Site Loads', () => {
+// 	beforeEach(() => {
+// 		cy.clearLocalStorage();
+// 		cy.visit('/');
+// 	});
+
+// 	it('Check Home page load', () => {
+// 		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#pako:eNp');
+// 	});
+
+// 	it('should load sample diagrams when clicked', () => {
+// 		cy.contains('Sample Diagrams').click();
+// 		cy.contains('Pie').click();
+// 		cy.contains('pie title Pets adopted by volunteers');
+// 		cy.contains('Class').click();
+// 		cy.contains('classDiagram');
+// 	});
+
+// 	(Cypress.env('CI') === 'true' ? describe : describe.skip)('github', () => {
+// 		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();
+// 		});
+// 	});
+
+// 	// Disabled temporarily. Should be enabled after the issue is fixed in Mermaid.
+// 	// 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\\"}","autoSync":true,"updateDiagram":true}`,
+// 	// 		true
+// 	// 	);
+// 	// 	cy.on('window:confirm', () => true);
+// 	// 	cy.visit(`/edit#${b64State}`);
+// 	// 	cy.contains('Config').click();
+// 	// 	cy.contains('forest');
+// 	// 	cy.contains('securityLevel').should('not.exist');
+// 	// 	cy.get('#view').find('img').should('not.exist');
+// 	// 	cy.get('#view').contains('<img');
+// 	// 	cy.get('#view').contains(`src='https://via.placeholder.com/64'`);
+// 	// });
+
+// 	it.skip('should allow persisting "securityLevel" using confirm dialogue', () => {
+// 		const b64State = toBase64(
+// 			`{"code":"graph TD\\nA[\\"<img src='https://dummyimage.com/64' width=64/>\\"]","mermaid":"{\\"securityLevel\\": \\"loose\\", \\"theme\\": \\"forest\\"}","autoSync":true,"updateDiagram":true}`,
+// 			true
+// 		);
+// 		cy.on('window:confirm', () => false);
+// 		cy.visit(`/edit#${b64State}`);
+// 		cy.get('#editor').type(' ');
+// 		cy.contains('Config').click();
+// 		cy.contains('forest');
+// 		cy.contains('securityLevel');
+// 		cy.get('#view').find('img').should('be.visible');
+// 	});
+
+// 	it('should show troubleshooting steps if loading fails', () => {
+// 		cy.visit('/#/edit/eyJjb2RlIjoiZ3JhcGggVERcbiAg');
+// 		cy.reload(true);
+// 		cy.contains('Please Click here to Raise an issue in github.');
+// 	});
+
+// 	it('should load uncompressed URL', () => {
+// 		cy.visit(
+// 			'/edit/#eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW05ldyBZZWFyXSAtLT58R2V0IG1vbmV5fCBCKEdvIHNob3BwaW5nKVxuICAgIEIgLS0-IEN7TGV0IG1lIHRoaW5rfVxuICAgIEMgLS0-fE9uZXwgRFtMYXB0b3BdXG4gICAgQyAtLT58VHdvfCBFW2lQaG9uZV1cbiAgICBDIC0tPnxUaHJlZXwgRltmYTpmYS1jYXIgQ2FyXSIsIm1lcm1haWQiOiJ7XG4gIFwidGhlbWVcIjogXCJkZWZhdWx0XCJcbn0iLCJ1cGRhdGVFZGl0b3IiOmZhbHNlLCJhdXRvU3luYyI6dHJ1ZSwidXBkYXRlRGlhZ3JhbSI6ZmFsc2V9'
+// 		);
+// 		cy.contains('New Year');
+// 		cy.visit(
+// 			'/edit#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'
+// 		);
+// 		cy.contains('Animal');
+// 		cy.visit(
+// 			'/edit/#base64:eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW05ldyBZZWFyXSAtLT58R2V0IG1vbmV5fCBCKEdvIHNob3BwaW5nKVxuICAgIEIgLS0-IEN7TGV0IG1lIHRoaW5rfVxuICAgIEMgLS0-fE9uZXwgRFtMYXB0b3BdXG4gICAgQyAtLT58VHdvfCBFW2lQaG9uZV1cbiAgICBDIC0tPnxUaHJlZXwgRltmYTpmYS1jYXIgQ2FyXSIsIm1lcm1haWQiOiJ7XG4gIFwidGhlbWVcIjogXCJkZWZhdWx0XCJcbn0iLCJ1cGRhdGVFZGl0b3IiOmZhbHNlLCJhdXRvU3luYyI6dHJ1ZSwidXBkYXRlRGlhZ3JhbSI6ZmFsc2V9'
+// 		);
+// 		cy.contains('New Year');
+// 	});
+
+// 	it('should load compressed URL', () => {
+// 		cy.visit(
+// 			'/edit#pako:eNpVkM2KwkAQhF-l6dMK5gVyEDRxvYi7sF6WjIcm0zqDzg_jBJEk725Hd2G3Tw31VVFUj23QjCWeEkUD-1p5kFs2O77BN1M6QFEshg1ncMHzfYDV2ybA1YQYrT_NXvhqgqDqtxPGkI315_ElVU__h-cB6mZLMYd4-Kvsb2GAdWM_jcT_V0xicb03RyqPVLSUoJI-OEfHyZHV0rqfDAqzYccKS3k1pbNC5Ufhuqgp81rbHBJKxuXKc6Quh6-7b7HMqeNfqLYkC7gfanwAlW1ZvQ'
+// 		);
+// 		cy.contains('New Year');
+// 		cy.visit(
+// 			'/edit#pako:eNptkU1PwzAMhv9K5BOI9Q9EXBDbJA477YYqITcxndV8QD40weh_Jy1rGR0-OY_tV2_sEyivCSQogzGuGduAtnaixINji0bcf1WVWGfVXdMtx8M1faYm4B8sxR27JLClJd6nwK4VLTlN4bI4jMQd2pLe3C4KFhNNcLQ92jv9ADGLNoTdozc-zIV4ZDsNlud7RtVN7_5Sb_jYrFcN3iN_0pPbEqUZK3QbTP_Ojyv4NdR4bwTHlyMbPcOQ3WJ2CliBpWCRdbnLqFJDOpClGmRJNYauhtr1pS-_6bKMjebkA8hXNJFWgDn5_YdTIFPINDWdb3vu6r8BaWOZRQ'
+// 		);
+// 		cy.contains('Animal');
+// 	});
+// });
+
+import { test, expect } from '@playwright/test';
+
+test.describe('site loads', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.addInitScript(() => {
+      window.localStorage.clear();
+    });
+    await page.goto('/', { waitUntil: 'networkidle' });
+  });
+
+  test('should load home page', async ({ page }) => {
+    expect(page.url()).toContain('/edit');
+    await expect(page.locator('"History"')).toBeVisible();
+    // const { origins } = await context.storageState();
+    // console.log(JSON.stringify(origins));
+    // expect(JSON.stringify(origins)).toMatchSnapshot('initial-storage-state.json');
+  });
+
+  test('should redirect from old URL', async ({ page }) => {
+    // Note that Promise.all prevents a race condition
+    // between clicking and waiting for a navigation.
+    await Promise.all([
+      page.waitForNavigation({ url: '**/edit#pako:eNp**', timeout: 1000 }),
+      page.goto(
+        '/#/edit/eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW0NocmlzdG1hc10gLS0-fEdldCBtb25leXwgQihHbyBzaG9wcGluZylcbiAgICBCIC0tPiBDe0xldCBtZSB0aGlua31cbiAgICBDIC0tPnxPbmV8IERbTGFwdG9wXVxuICAgIEMgLS0-fFR3b3wgRVtpUGhvbmVdXG4gICAgQyAtLT58VGhyZWV8IEZbZmE6ZmEtY2FyIENhcl0iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9LCJ1cGRhdGVFZGl0b3IiOmZhbHNlfQ'
+      )
+    ]);
+    expect(page.url()).toContain('/edit#pako:eNp');
+  });
+
+  test('should load sample diagrams when clicked', async ({ page }) => {
+    await page.click('"Sample Diagrams"');
+    await page.click('"Pie"');
+    await expect(page.locator('"pie title Pets adopted by volunteers"')).toBeVisible();
+    await page.click('"Class"');
+    await expect(page.locator('"classDiagram"')).toBeVisible();
+  });
+});
+// test('homepage has Playwright in title and get started link linking to the intro page', async ({
+// 	page,
+// 	context
+// }) => {
+// 	await page.goto(
+// 		'http://localhost:3000/edit?gist=https://gist.github.com/sidharthv96/6268a23e673a533dcb198f241fd7012a/ec9b4ab0e41e4ff6287326cd3cb47affd7851e19'
+// 	);
+
+// 	// cy.getLocalStorage('codeStore').snapshot();
+// 	// Expect a title "to contain" a substring.
+// 	await page.locator('"History"').click();
+// 	await page.locator('"Party"').isVisible();
+// 	await page.locator('"Revisions"').isVisible();
+// 	await page.locator('"sidharthv96 v7851e19"').isVisible();
+// 	await page.waitForTimeout(400);
+// 	const storage = await context.storageState();
+// 	expect(JSON.stringify(storage)).toMatchSnapshot();
+// });
@@ -0,0 +1,17 @@
+[
+  {
+    "origin": "http://localhost:3000",
+    "localStorage": [
+      { "name": "__anon_id", "value": "\"87f53493-b439-425c-961c-9a2014f0ced8\"" },
+      { "name": "manualHistoryStore", "value": "[]" },
+      { "name": "autoHistoryMode", "value": "\"manual\"" },
+      {
+        "name": "codeStore",
+        "value": "{\"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}\",\"autoSync\":true,\"updateDiagram\":true}"
+      },
+      { "name": "migrations", "value": "{\"version\":0}" },
+      { "name": "themeStore", "value": "{\"theme\":\"light\",\"isDark\":false}" },
+      { "name": "autoHistoryStore", "value": "[]" }
+    ]
+  }
+]
@@ -0,0 +1 @@
+[{"origin":"http://localhost:3000","localStorage":[{"name":"__anon_id","value":"\"e4127e54-eced-443f-837e-0986e577b624\""},{"name":"manualHistoryStore","value":"[]"},{"name":"autoHistoryMode","value":"\"manual\""},{"name":"codeStore","value":"{\"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}\",\"autoSync\":true,\"updateDiagram\":true}"},{"name":"migrations","value":"{\"version\":0}"},{"name":"themeStore","value":"{\"theme\":\"light\",\"isDark\":false}"},{"name":"autoHistoryStore","value":"[]"}]}]
@@ -6,8 +6,12 @@
    "cypress/**/*.ts",
    "cypress/**/*.js",
    "cypress/**/*.json",
+    "tests/**/*.ts",
+    "tests/**/*.js",
+    "tests/**/*.json",
    "static/**/*.js",
-    "static/**/*.json"
+    "static/**/*.json",
+    "./playwright.config.ts"
  ],
  "compilerOptions": {
    "resolveJsonModule": true,
@@ -1,7 +1,6 @@
 import { sveltekit } from '@sveltejs/kit/vite';
-import { defineConfig } from 'vitest/config';
-
-export default defineConfig({
+/** @type {import('vite').UserConfig} */
+const config = {
  plugins: [sveltekit()],
  envPrefix: 'MERMAID_',
  optimizeDeps: { include: ['mermaid'] },
@@ -23,4 +22,5 @@ export default defineConfig({
      reporter: ['text', 'json', 'html', 'lcov']
    }
  }
-});
+};
+export default config;
				`@@ -0,0 +1 @@`
				[{"origin":"http://localhost:3000","localStorage":[{"name":"__anon_id","value":"\"e4127e54-eced-443f-837e-0986e577b624\""},{"name":"manualHistoryStore","value":"[]"},{"name":"autoHistoryMode","value":"\"manual\""},{"name":"codeStore","value":"{\"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}\",\"autoSync\":true,\"updateDiagram\":true}"},{"name":"migrations","value":"{\"version\":0}"},{"name":"themeStore","value":"{\"theme\":\"light\",\"isDark\":false}"},{"name":"autoHistoryStore","value":"[]"}]}]