ReadMeFeed / Community knowledge
Real questions. Useful conversations. Find the people who know your stack.
Languages & runtimes · #html5
Native HTML5 lazy loading defers offscreen images and iframes without JS. Learn how to implement it without hurting your LCP or causing layout shifts.
Learn how to use the HTML5 LocalStorage API for client‑side persistence. This guide covers JSON serialization for objects, storage limits, and critical security warnings.
Stop blurry HTML5 Canvas renders on Retina and 4K displays. Learn how to use devicePixelRatio to synchronize CSS dimensions with the internal drawing surface.
Use HTML5 localStorage to save form drafts across reloads, but respect its 5MB limit, synchronous access, and lack of encryption.
A decision guide for choosing and implementing service worker caching strategies in HTML5 apps. Covers cache-first, network-first, and stale-while-revalidate patterns with a production-ready hybrid implementation, validation steps, and browser-specific limitations.
A diagnostic guide for HTML5 semantic element misuse that causes layout shifts and accessibility failures. Covers landmark checks, duplicate main detection, heading-less sections, and verification steps.
Canvas gives you a bitmap and a clock—everything else is yours to build. This post covers DPR scaling, state discipline with save/restore, and the accessibility work you can't skip.
Discover how <code><picture></code> lets browsers pick the right image for any viewport, reducing bandwidth and improving performance. See a hands‑on example, trade‑offs, and next steps.
Learn how to diagnose and fix missing HTML5 landmarks to improve screen reader accessibility and SEO by replacing generic divs with semantic elements.