Web platform features explorer

Let and const

Widely available since 2019-03-20
Tags: javascript Groups: JavaScript

The let and const declarations define block-scoped variables.

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Browser support (view on caniuse.com)

  • Chrome 49 Released on 2016-03-02
  • Chrome Android 49 Released on 2016-03-09
  • Edge 14 Released on 2016-08-02
  • Firefox 44 Released on 2016-01-26
  • Firefox for Android 44 Released on 2016-01-26
  • Safari 10 Released on 2016-09-20
  • Safari on iOS 10 Released on 2016-09-13