Apply the unicode flag to `pattern' attribute values. Syntax checking will be stricter, and '.' matches to a surrogate pair, and some other benefits.



Working draft or equivalent

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 53
  • Chrome for Android release 53
  • Android WebView release 53

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • Shipped/Shipping
  • No signal
  • No signal
  • No signals


Search tags

pattern input unicode,

Last updated on 2020-11-09