How far ahead Chrome, Firefox and Safari fetch lazy media, why a lazy hero image slows your page, and where to use lazy, eager and fetchpriority.

The sizes property of the HTMLImageElement interface allows you to specify the layout width of the image for each of a list of media queries, or auto for lazy-loaded images to allow the browser to aut...

Description When we looked into JPEG XL, I asked developers why they were interested in the format, and the most common answer was "progressive rendering". This is now working in Firefox and Chrome...

Build real, composable web components using markup and CSS, with no JavaScript

The ad that became a meme. AKA "I drew it, really!"

Because I haven't published anything to it since August 31. And no one else has either. That's not a super long time to go silent but it is for a site that

web-platform-tests Interop project. Contribute to web-platform-tests/interop development by creating an account on GitHub.

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Poems, readings, poetry news and the entire 110-year archive of POETRY magazine.

As of Firefox 157 I intend to turn JPEG XL decoding on by default on all platforms. It has been developed behind image.jxl.enabled, which today is on by default on Nightly only, and has had a Firefox…

An atlas of the vibrance of the real world

My name is Mat Marquis, and I believe in the web.

We're opening the waitlist for our Monetization Gateway, which will allow you to charge for any web page, dataset, API, or MCP tool behind Cloudflare. The charges will settle in stablecoins over the x...

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On designing finger-friendly interactions

Briar Press: A letterpress community. Museum of Printing Presses, Letterpress Classifieds, Printer's Yellow Pages, and vintage postscript artwork for download.

Hi, just me heading off some bad advice I’m starting to see in developer venues. Background The proposed Document Outline Algorithm, where headings would automatically reset themselves to the appropri...

Mat Marquis isn't known for pulling his punches. And yet, Marquis stopped short when he declared The End of Responsive Images. Mat left responsive images on the ropes. I hope to finish them.

Each pseudo element plays a distinct role in how the view transition animates. The browser does most of the heavy lifting though, which makes it a little hard to see what’s actually happening under th...

Safari 27 beta is here.

WebKittens @mwyrzykowski @marcoscaceres Title of the proposal WebMCP URL to the spec https://webmachinelearning.github.io/webmcp/ URL to the spec's repository https://github.com/webmachinelearning/...

A blog about software craft and quality

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A better way to build web sites. Fast, flexible, and built to last.

Learn about new out-of-order streaming capabilities and the renewed HTML insertion and streaming methods available for testing from Chrome 148

The Web is slow-motion collapsing for multiple reasons, but at the heart of it all is a little known system: the Search/Browser Levy. Let's fix it!

A better way to build web sites. Fast, flexible, and built to last.