tab-size supports <number> css value type

Category: CSS
Type: New or changed feature
Status: Enabled by default (Chrome 77)
Intent stage: Prepare to ship

Breaking change: No
Enterprise impact: None
Spec maturity: Published standard
Web Platform Tests: Yes

WPT details: Below web platform tests are for 'tab-size' <number> value type. 1) third_party/blink/web_tests/external/wpt/css/css-text/parsing/tab-size-computed.html 2) third_party/blink/web_tests/external/wpt/css/css-text/parsing/tab-size-valid 3) third_party/blink/web_tests/external/wpt/css/css-text/tab-size/tab-size.html 4) third_party/blink/web_tests/external/wpt/css/css-typed-om/the-stylepropertymap/properties/tab-size.html 5) third_party/blink/web_tests/external/wpt/css/css-values/calc-numbers.html

Summary

Adds support for <number> css value type to the CSS property tab-size, which determines the tab size used to render preserved tab characters. 'tab-size' accepts an <integer> or a <number> as its value type, and represents the measure as a real-number multiple of the space character’s advance width, in addition to its integer multiple.

Standards & signals

Specification: https://drafts.csswg.org/css-text-3/#tab-size-property
Firefox: No signal
Safari: Shipped/Shipping
Web developers: No signals
Tracking bug: https://bugs.chromium.org/p/chromium/issues/detail?id=974090

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=tab-size-supports-number-css-value-type
Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+tab-size%20supports%20%3Cnumber%3E%20css%20value%20type
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=tab-size%20supports%20%3Cnumber%3E%20css%20value%20type
Baseline status: https://webstatus.dev/?q=tab-size%20supports%20%3Cnumber%3E%20css%20value%20type

Explainers: https://drafts.csswg.org/css-text-3/#tab-size-property

View on chromestatus.com