In ECMAScript 2015, the "name" property on anonymous Function objects is sometimes set based on the syntactic position of the function (or class) expression. For example: var x = function() { }; === 'x'


Established standard

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 51
  • Chrome for Android release 51
  • Android WebView release 51

Consensus & Standardization

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

  • In development
  • Shipped/Shipping
  • No signal
  • No signals


Last updated on 2020-11-09