15 articles
RSSHow to fix Playwright component testing errors — playwright-ct.config not found, mount fixture undefined, CSS not loaded in tests, Vite alias for imports, TypeScript paths, hooks (beforeMount), and snapshot strategy.
How to fix Sentry source maps errors — minified stack traces, release name mismatch between build and runtime, sentry-cli upload-sourcemaps options, Vite/Webpack/Next.js plugin setup, and hiding maps from public.
How to fix React Compiler issues — eslint-plugin-react-compiler not flagging, babel-plugin-react-compiler not running, 'Function contains a code construct that prevents compilation', Next.js 15 config, and removing useMemo/useCallback safely.
How to fix React Router v7 errors — framework mode vs library mode setup, loader/action data type narrowing, route module exports missing, single-fetch revalidation, hydration mismatch, and Remix v2 migration paths.
How to fix Tailwind CSS v4 errors — tailwind.config.js ignored, @import 'tailwindcss' not loading, @theme custom values not applied, content scanning misses files, Vite plugin setup, and v3 to v4 migration gotchas.
How to fix Vite dev server proxy issues — proxy configuration in vite.config.ts, path rewriting, WebSocket proxying, HTTPS targets, and common misconfigurations.
How to fix path alias errors in webpack and Vite — configuring resolve.alias, tsconfig paths, babel-plugin-module-resolver, Vite alias configuration, and Jest moduleNameMapper.
How to fix Vite environment variables showing as undefined — missing VITE_ prefix, wrong .env file for the mode, import.meta.env vs process.env, TypeScript types, and SSR differences.
How to fix Vite's chunk size warning — why bundles exceed 500 kB, how to split code with dynamic imports and manualChunks, configure the chunk size limit, and optimize your Vite production build.
How to fix TypeScript path aliases not resolving — tsconfig paths configured but imports still fail at runtime, in Jest, or after building with webpack, Vite, or ts-node.
How to fix the '[vite] server connection lost. Polling for restart...' error and HMR not working. Covers file watcher limits, WebSocket config, Docker polling, WSL2, proxy forwarding, SSL issues, firewall blocking, and dependency pre-bundling.
How to fix 'Loading chunk failed', 'ChunkLoadError', and 'Failed to fetch dynamically imported module' in webpack, Next.js, React, and Vite. Covers stale deployments, CDN caching, publicPath misconfiguration, service worker cache, code splitting, dynamic import retry strategies, React.lazy error boundaries, and Next.js-specific solutions.
How to fix 'ERR_CONNECTION_REFUSED', 'localhost refused to connect', and 'This site can't be reached' errors when accessing localhost in Chrome, Firefox, and Edge. Covers dev servers, port issues, 0.0.0.0 vs 127.0.0.1, Docker port mapping, WSL2, firewalls, and more.
How to fix 'Module not found: Can't resolve' in webpack, Vite, and React, and 'Cannot find module or its corresponding type declarations' in TypeScript. Covers missing packages, wrong import paths, case sensitivity, path aliases, node_modules corruption, monorepo hoisting, barrel files, and asset imports.
How to fix Vite's 'Failed to resolve import' error, including 'Does the file exist?', 'Optimized dependency needs to be force included', 'Pre-transform error', and '504 (Outdated Optimize Dep)'. Covers missing packages, path aliases, optimizeDeps, cache clearing, and CJS/monorepo edge cases.