Symbol.hasInstance enables customizing the behavior of the 'instanceof' operator.

Specification

Specification link


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

Status in Chromium

Blink


In developer trial (Behind a flag) (tracking bug)

Consensus & Standardization

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

  • No signal
  • In development
  • No signals

Owner

Last updated on 2020-11-09