Performance et accessibilité
Chrome UX Report: The Decisions That Matter
A public dataset of real-user performance measurements collected from Chrome users who have opted in, reported for origins and popular URLs. Key takeaways Data...
Lumexa Media · Articles
Performance & accessibilité
Core Web Vitals, conformité WCAG et la piste d'audit qui prouve les deux.
163 articles in Performance & Accessibility · every discipline
Performance et accessibilité
PageSpeed Insights, Done Properly
Google's free tool that reports real-user Core Web Vitals from the Chrome UX Report alongside a Lighthouse lab test for a given URL. Key takeaways Field se...
Performance et accessibilité
Long Tasks and the Main Thread, Done Properly
The browser's main thread handles layout, painting and most JavaScript, and any single task that runs for more than 50 milliseconds blocks it from respondi...
Performance et accessibilité
Web Workers, Done Properly
Background threads that run JavaScript separately from the page's main thread, used for heavy computation such as parsing data, image processing or search...
Performance et accessibilité
Tree Shaking and Bundle Size, Done Properly
Removing unused code from JavaScript bundles during the build, so visitors only download the functions a page actually uses. Key takeaways Tree shaking: dead-co...
Performance et accessibilité
Text Compression with Brotli and Gzip: What Actually Works
Compressing HTML, CSS, JavaScript and other text responses on the server so they transfer in far fewer bytes, then decompressing them in the browser. Key takeaw...
Performance et accessibilité
Critical CSS: The Decisions That Matter
Delivering the styles needed to render the visible part of the page immediately, often inline in the HTML, and loading the rest of the CSS without blocking rend...
Performance et accessibilité
How to Get Lazy Loading Images Right
Deferring the download of images until they are about to scroll into view, using the loading="lazy" attribute or a script. Key takeaways Native attrib...
Performance et accessibilité
Content Visibility and Rendering Work: The Decisions That Matter
Using the CSS content-visibility property so the browser skips layout and painting for sections of a long page that are off screen until they are needed. Key ta...
Performance et accessibilité
Long Animation Frames: The Decisions That Matter
A browser API that reports rendering frames that took longer than 50 milliseconds, with details of the scripts responsible, used to diagnose slow interactions....
Performance et accessibilité
Server-Timing Header: What Actually Works
An HTTP response header that reports how long server-side steps took, such as database queries or cache lookups, so the timings appear in browser tools and moni...
Performance et accessibilité
A Practical Guide to 103 Early Hints
An informational HTTP response a server or CDN sends before the final response, telling the browser which critical resources to preload or connect to while the...
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