'let' and 'const' declarations define variables/constants with block scoping in strict mode.

Demo

Documentation

Specification

Established standard

Status in Chromium

Blink


Enabled by default in:

  • Chrome for desktop release 41
  • Chrome for Android release 41

Consensus & Standardization

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

Owners

Last updated on 2020-11-09