Regular Expression Buffer Boundaries

Category: JavaScript
Type: Chromium catches up
Status: Proposed (Chrome Proposed)
Intent stage: None

Breaking change: No
Enterprise impact: None
Spec maturity: Working draft

Summary

A TC39 proposal introducing `\A`, `\z` and `\Z` character escapes to Unicode-mode regular expressions as synonyms for `(?-m:^)`, `(?-m:$)` and `(?=(?:\r\n|\n|\r|\u2028|\u2029)?(?-m:$))`, respectively.

Standards & signals

Specification: https://tc39.es/proposal-regexp-buffer-boundaries
Firefox: Shipped/Shipping
Safari: No signal
Web developers: No signals
Tracking bug: https://g-issues.chromium.org/issues/517575874

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=regular-expression-buffer-boundaries
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+Regular%20Expression%20Buffer%20Boundaries
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=Regular%20Expression%20Buffer%20Boundaries
Baseline status: https://webstatus.dev/?q=Regular%20Expression%20Buffer%20Boundaries

Explainers: https://github.com/tc39/proposal-regexp-buffer-boundaries

View on chromestatus.com