Experimental CSS: Masonry layout without JavaScript Jen Simmons is a member of the CSS Working Group. In this Codepen demo, she explores an experimental implementation of a potential CSS specification to support a masonry layout without using JavaScript. To experience it, visit the demo in Firefox Nightly (or Developer Edition) and follow her instructions to enable the relevant CSS features. | Find Out More |
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Experimental CSS: where() Byte for byte, JavaScript is expensive. Adding flexibility to CSS makes it possible to accomplish more with less code, which can have a significant impact on performance. Firefox Nightly and Developer Edition are the first to support the CSS pseudo-class :where() , which provides developers a new way to signal their intent in CSS declarations. Read The Spec → |
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Stable CSS for performance: Faster image loading now |
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Jen Simmons explains how to use CSS to improve your image loading performance (and user experience) in this Mozilla Developer video. Watch Now → |
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Stable CSS for accessibility: Using outline Mozilla Tech Speaker Wojtek Połowniak recently launched a platform/personal blog created with #a11y and #performance in mind. His most recent article explains why and how to use the CSS outline property. Learn Now → |
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Check CSS browser compatibility easily in Firefox DevTools. Find the Compatibility panel in the Inspector sidebar in Firefox, Nightly or Developer Edition. Try It Out → |
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