URLPattern: RegExp v flag instead of u

Category: Miscellaneous
Type: No developer-visible change
Status: Enabled by default (Chrome 121)
Intent stage: None

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

WPT details: https://wpt.fyi/results/urlpattern/urlpattern.any.html Tests for set notations were added in https://github.com/web-platform-tests/wpt/pull/43014

Summary

The URL Pattern API allows developers to specify pattern strings. Those are transformed to regular expressions internally. When the API was first implemented, these regular expressions were compiled with the u flag. We're going to update it to the v flag, enabling Unicode sets.

Standards & signals

Specification: https://urlpattern.spec.whatwg.org/
Firefox: No signal
Safari: No signal
Web developers: No signals
Tracking bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1482263

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=urlpattern%2Furlpattern
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+URLPattern%3A%20RegExp%20v%20flag%20instead%20of%20u
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=URLPattern%3A%20RegExp%20v%20flag%20instead%20of%20u
Baseline status: https://webstatus.dev/?q=URLPattern%3A%20RegExp%20v%20flag%20instead%20of%20u

View on chromestatus.com