How we built it

Symbols (ES6)

Allows properties to be added to existing objects without the possibility of interference with the existing properties, unintended visibility, or with other uncoordinated additions by any other code.



Established standard

Status in Chromium

Enabled by default (launch 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 2016-01-27