Let and const

The let and const declarations define block-scoped variables.

Baseline Status: Achieved Widely Available on Mar 20, 2019 (Cross-browser Newly Available since Sep 20, 2016).

Desktop Browser Engine Support

Google Chrome

49

Supported

Mozilla Firefox

44

Supported

Apple Safari

10

Supported

Microsoft Edge

14

Supported

Mobile Browser Engine Support

Chrome Android

49

Firefox Android

44

Safari iOS

10

Specifications and References

MDN Browser Compat Data Keys: