Allows formal parameters to be initialized with default values if no value (or 'undefined') is passed.

Demo

Documentation

Specification

Established standard

Status in Chromium

Blink


Enabled by default (tracking bug) in:

  • Chrome for desktop release 49
  • Chrome for Android release 49

Consensus & Standardization

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

Owner

Last updated on 2020-11-09