Currently, we only log a message to the console. For consistency with other APIs, the WhatWG spec now requires that throws a DOMException "SyntaxError" instead.


Established standard

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 60
  • Chrome for Android release 60

Consensus & Standardization

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

  • Shipped/Shipping
  • Shipped/Shipping
  • Positive
  • No signals



WPT tests are part of the url/ directory which blink doesn't import UseCounter:

Last updated on 2020-11-09