834 articles — Page 49 of 70
How to fix React.lazy and Suspense errors — Element type is invalid, A React component suspended while rendering, Loading chunk failed, and lazy import mistakes with named vs default exports.
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 Webpack Hot Module Replacement not updating the browser — HMR connection lost, full page reloads instead of hot updates, and HMR breaking in Docker or behind a proxy.
How to fix CSS Flexbox not working — why display flex has no effect, flex children not aligning, flex-grow not stretching, and how to debug common Flexbox layout issues.
How to fix 'git fatal: A branch named already exists' when creating or renaming branches — including local conflicts, remote tracking branches, and worktree issues.
How to fix UnhandledPromiseRejectionWarning in Node.js and unhandled promise rejection errors in JavaScript caused by missing catch handlers, async/await mistakes, and event emitter errors.
How to fix Jest 'Exceeded timeout of 5000ms for a test' errors caused by unresolved promises, missing done callbacks, async/await mistakes, and slow database or network calls in tests.
How to fix 'sudo: command not found' on Linux — caused by sudo not installed, missing PATH in scripts, Docker containers without sudo, and su vs sudo confusion on minimal systems.
How to fix Nginx location blocks not matching — caused by prefix vs regex priority, trailing slash issues, root vs alias confusion, and try_files misconfiguration.
How to fix Python SSL CERTIFICATE_VERIFY_FAILED error caused by missing root certificates on macOS, expired system certs, corporate proxies, and self-signed certificates in requests, urllib, and httpx.
How to fix React Context not triggering re-renders — caused by mutating state directly, wrong provider placement, stale closures, and missing value changes that React can detect.
How to fix 'No routes matched location' in React Router v6 — caused by missing Routes wrapper, wrong path syntax, nested route mismatches, and v5 to v6 migration issues.