Phase 8: PWA & Final Polish#316
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- Replace Angular build config with Vite + React 18 setup - Create vite.config.ts, tsconfig.json, package.json with React deps - Add entry points: src/main.tsx, src/App.tsx, index.html - Port SCSS theming files (_themes.scss, _theme_variables.scss, _media.scss) - Define TypeScript interfaces in src/types/ (Story, Comment, User, Settings, PollResult, FeedType) - Move static assets to public/ directory for Vite serving - Remove Angular-specific files: angular.json, tsconfig.app/spec.json, tslint.json, karma.conf.js, ngsw-config.json, browserslist, polyfills.ts, test.ts, all *.module.ts files - Remove Angular dependencies, add react, react-dom, react-router-dom v6 - Verify npm run dev starts and app shell renders Co-Authored-By: Vibha Seshadri <vibha.seshadri@cognition.ai>
- Add src/services/hackernews-api.ts: fetchFeed, fetchItemContent (with poll sub-fetching via Promise.all), fetchPollContent, fetchUser using plain fetch - Add src/contexts/SettingsContext.tsx: React Context + useReducer for Settings state, localStorage persistence, system dark mode detection with matchMedia listener - Add src/components/shared/Loader.tsx + SCSS: CSS loading animation ported from Angular - Add src/components/shared/ErrorMessage.tsx + SCSS: skull error display ported from Angular - Add src/utils/formatComment.ts: replaces Angular CommentPipe (0→'discuss', 1→'1 comment', n→'n comments') - Update tsconfig.json include paths for new directories Co-Authored-By: Vibha Seshadri <vibha.seshadri@cognition.ai>
- Add Header with NavLink navigation, logo, settings toggle, scrollTo(0,0) on nav clicks - Add Footer with static content matching Angular template - Add Settings panel with theme radios, open-in-new-tab checkbox, font size and list spacing inputs - All components consume SettingsContext - Port all SCSS styles from Angular components Co-Authored-By: Vibha Seshadri <vibha.seshadri@cognition.ai>
- FeedPage: paginated feed with loader/error states, 30 items/page, prev/more navigation - ItemRow: story row with external/internal link logic, domain, points, user, time_ago, comment count - Respects settings: titleFontSize, listSpacing, openLinkInNewTab - Mobile/laptop responsive layouts via subtext-palm/subtext-laptop - Jobs feed special header text - SCSS ported from Angular feed and item components Co-Authored-By: Vibha Seshadri <vibha.seshadri@cognition.ai>
- ItemDetailsPage: fetches item by ID, back button via useNavigate(-1), poll results with percentage bars, dangerouslySetInnerHTML for content, mobile/laptop responsive layouts - Comment: recursive rendering of nested comments, collapse/expand toggle, deleted comment display - SCSS ported from Angular item-details and comment components Co-Authored-By: Vibha Seshadri <vibha.seshadri@cognition.ai>
- UserPage: fetches user by ID, back button via useNavigate(-1), profile display with username, karma, created date, about (dangerouslySetInnerHTML) - Mobile/laptop responsive layout ported from Angular - Loader/ErrorMessage for loading/error states Co-Authored-By: Vibha Seshadri <vibha.seshadri@cognition.ai>
- Wire up react-router-dom v6 Routes in App.tsx - / redirects to /news/1 - /news/:page, /newest/:page, /show/:page, /ask/:page, /jobs/:page → FeedPage with feedType prop - /item/:id → ItemDetailsPage, /user/:id → UserPage - Theme class on root div from SettingsContext (dynamic: default/night/amoledblack) - SettingsProvider wraps entire app - GA tracking via useLocation hook on route changes - Header + Routes (Outlet equivalent) + Footer layout Co-Authored-By: Vibha Seshadri <vibha.seshadri@cognition.ai>
- Add vite-plugin-pwa for service worker generation with autoUpdate - Configure manifest with app icons, theme color, display standalone - Add workbox runtimeCaching for HN API (NetworkFirst strategy) - Remove static public/manifest.json (now generated by vite-plugin-pwa) - Production build verified: sw.js + workbox generated, 9 precache entries Co-Authored-By: Vibha Seshadri <vibha.seshadri@cognition.ai>
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Summary
Adds PWA support via
vite-plugin-pwaand final production build verification.Changes:
vite.config.ts: AddedVitePWA({ registerType: 'autoUpdate' })with manifest config (icons, theme color, display standalone) and workboxruntimeCachingfor HN API (NetworkFirststrategy, 5min TTL)public/manifest.json— now generated by the plugin at build timenpm run buildproduces:sw.js,workbox-*.js,registerSW.js, 9 precache entriesThis completes the Angular 9 → React 18 migration. All 8 phases:
Depends on Phase 7 (#315).
Link to Devin session: https://app.devin.ai/sessions/0bb1dd94ecbc4422a76b7a458d0f4e7c
Requested by: @vibhaseshadri-cognition
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