Build your own SPA router with URLPattern
Learn to wire URLPattern, web components, and History API into a tiny vanilla JS SPA router.
JavaScript news — Page 2
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Performance monitoring for web components
Using the User Timing API to track real-world component performance
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Testing HTML Light DOM web components is easier than expected
How Light DOM, Lit, and Testing Library made a legacy app’s web components testable.
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The inner workings of JavaScript source maps
A deep dive into how source maps link minified JavaScript back to original code.
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Nineteen talks from the CascadiaJS 2025 conference
Playlist offers 19 sessions on AI, JS origins, frameworks, CSS, monetization and more.
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<color‑input>, a modern color picker web componentAdvanced color picker supports wide-gamut and multiple color spaces.
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Searchable, collapsible sections with
hidden="until-found"Enhancing collapsible sections with progressive discovery and better find-in-page support.
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Directives and the platform boundary
Tanner Linsley warns that framework directives blur the line between JS and the platform.
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Evaluating frameworks performance
Comparing 10 meta-frameworks: Marko, SolidStart, SvelteKit, Qwik lead. React has limits.
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Importing vs fetching JSON
When to use JSON module imports vs fetch(): caching, responses, errors, and use cases.
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React Compiler v1.0
Stable compiler auto-optimizes components, improves speeds up to 12%, used in Meta apps.
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Announcing Vite+: a unified toolchain for JavaScript
Rust-based unified toolchain with build, test, lint, format, and visual tools for JS projects.