831 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.