For a very long time, the first two arguments (type and listener) of addEventListener and removeEventListener have been optional, where they are non-optional in the spec and other browsers. This will change, so that calling these methods with zero or one argument will start to throw exceptions.




Specification link

Final published standard: Recommendation, Living Standard, Candidate Recommendation, or similar final form

Status in Chromium


Enabled by default (tracking bug)

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 signals


Last updated on 2020-11-09