Unscopables (ES6)

Unscopables allows properties to be hidden to with statement lookup rules. This is important for adding new properties to existing objects both in JavaScript and in DOM.


Established standard

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 38
  • Chrome for Android release 38
  • Opera release 25
  • Opera for Android release 25

Consensus & Standardization


Last updated on 2017-06-14