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Google's site for web platform guidance, and where Baseline status changes are announced.

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web.dev title card reading "New to the web platform in July", with a hot-air balloon on the left.
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New on the web platform in July: Firefox 153 and Chrome 151

Rachel Andrew summarizes July's stable releases. Firefox 153 widens how the select element is parsed so that any nested element is allowed inside it, which opens the path to genuinely customizable dropdowns without JavaScript replacements. The same release brings the Picture-in-Picture API to desktop, the Intl.Locale Info API with getCalendars(), getTimeZones(), and getWeekInfo(), and IndexedDB getAllRecords(). Chrome 151 adds the CSS ruby-overhang property, manual slot assignment in declarative Shadow DOM through the shadowrootslotassignment attribute, and the animation property on the AnimationEvent and TransitionEvent interfaces.

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web.dev title card reading "July 2026 Baseline monthly digest", beside the large Baseline check mark.
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July Baseline digest: Intl.Locale and rect() cross the line

The edition published on August 10 moves Intl.Locale into newly available — a standard way to parse, modify, and inspect Unicode language and region tags, useful anywhere dates, numbers, and currencies are formatted without an extra library. Array.fromAsync(), which turns asynchronous data streams into an array, and the CSS rect() function, which describes rectangular shapes for clip-path and offset-path far more readably than going through polygon(), both moved to widely available. An updated MDN guide to choosing image formats shipped alongside the digest.

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web.dev title card reading "May 2026 Baseline monthly digest", beside the large Baseline check mark.
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May Baseline digest: container style queries and the :open pseudo-class

Newly available now includes container style queries, which let you style based on a custom property of a parent element, along with the :open pseudo-class for dialog and details, the ToggleEvent.source property, the image-rendering property that keeps pixel art and QR codes sharp when scaled, the text-decoration-skip-ink: all value, and SharedWorker. Widely available now covers the lh and rlh units, Navigator.userActivation, clip-path, and the :user-invalid pseudo-class.

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