Frontend
Traps in deploying, building and serving.
Next.js Server Action Fail-Open: error Read as Success2026-09-22"An invalid form control is not focusable" killed submit2026-09-10Telling not-allowed From no-speech in SpeechRecognition2026-09-08Missing frame-src in CSP Blocks YouTube, Kills Watch Logs2026-09-07cqw Fails Silently When the DOM Around It Changes2026-09-04A disabled Submit Button Dies Before Hydration2026-09-04Only One Branch Had No Way to Add the First Item2026-08-30left:50% With width:fit-content Makes max-width Never Apply2026-08-29An inset box-shadow Ring Hides Behind a Child Background2026-08-29The Edit Form Pruned Selections It Could Not See2026-08-28Narrowing a Page's Roles Left the Action's Gate2026-08-28A Leftover sticky top:0 Makes a fixed Bar Fill the Screen2026-08-27A New httpOnly Cookie 401s Only Already-Logged-In Users2026-08-26A Public Route Missing From the middleware matcher2026-08-26proxy.ts Redirected API-Key Endpoints to the Login Page2026-08-25?? Defaults Overwrite Fields the Form Never Sent2026-08-25A Temp-Password Guard Written Per Page Leaks by URL2026-08-24Permissions-Policy: microphone=() Blocks Your Own Origin Too2026-08-22Remounting a Form by key Resets Uncontrolled Inputs2026-08-20Half-Controlled Forms Silently Revert on Resubmit2026-08-19Linking Everyone to a Tenant-Only Feature Gave 5022026-08-19A Missing force-dynamic Froze a Flag Flip Behind Static HTML2026-08-18Auth Middleware Redirects robots.txt to the Login Page2026-08-17Astro 7 Breaks Content Collections in Three Places2026-08-16Next.js Bundling a wasm Package Breaks Only in Production2026-08-16Three Vercel Traps I Hit After Going Live2026-08-15