Enable ES6-style block-scoped bindings including let and class in sloppy mode, and modify semantics of const and function to operate according to ES6 in sloppy mode.


Established standard

Status in Chromium


Enabled by default 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.


Last updated on 2020-11-09