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let

Last updated on : 2023-03-20

Note:
let shows a browser compatibility score of 97. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.

Overview

Unlike the var keyword, it allows you to declare variables that are only valid within the scope of the block statement or expression on which it is used.

Specifications

ECMAScript Language Specification # sec-let-and-const-declarations

Syntax

let name1 [= value1] [, name2 [= value2]] [, ..., nameN [= valueN];

Code snippets

index.html

Source:index.html Github

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Full Screen

001272.html

Source:001272.html Github

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Full Screen

Browser Compatibility

  • let on IE is fully supported on None of the versions, partially supported on 11-11, and not supported on 5.5-10 IE versions.
  • let on Edge is fully supported on 12-111, partially supported on None of the versions, and not supported on below 12 Edge versions.
  • let on Firefox is fully supported on 44-113, partially supported on None of the versions, and not supported on 2-43 Firefox versions.
  • let on Chrome is fully supported on 49-114, partially supported on 41-48, and not supported on 4-40 Chrome versions.
  • let on Safari is fully supported on 11-16.4, partially supported on 10-10.1, and not supported on 3.2-9 Safari versions.
  • let on Opera is fully supported on 36-95, partially supported on 28-35, and not supported on 9.5-27 Opera versions.
  • let on Safari on iOS is fully supported on 11-16.4, partially supported on 10-10.3, and not supported on 3.2-9 Safari on iOS versions.
  • let on Android Browser is fully supported on 97-111, partially supported on None of the versions, and not supported on 2.1-4 Android Browser versions.
  • let on Opera Mobile is fully supported on 64-73, partially supported on None of the versions, and not supported on 10-12 Opera Mobile versions.
  • let on Chrome for Android is fully supported on 97-111, partially supported on None of the versions, and not supported on below 97 Chrome for Android versions.
  • let on Firefox for Android is fully supported on 95-110, partially supported on None of the versions, and not supported on below 95 Firefox for Android versions.
  • let on Samsung Internet is fully supported on 5-20, partially supported on 4-4, and not supported on below 4 Samsung Internet versions.
97
Hightooltip

Browser Compatibility Score

Chrome IE
Medium

Browser Support For IE Versions

-
Fully
11-11
Partially
5.5-10
No Support
Chrome Edge
High

Browser Support For Edge Versions

12-111
Fully
-
Partially
-
No Support
Chrome Firefox
High

Browser Support For Firefox Versions

44-113
Fully
-
Partially
2-43
No Support
Chrome Chrome
High

Browser Support For Chrome Versions

49-114
Fully
41-48
Partially
4-40
No Support
Chrome Safari
High

Browser Support For Safari Versions

11-16.4
Fully
10-10.1
Partially
3.2-9
No Support
Chrome Opera
High

Browser Support For Opera Versions

36-95
Fully
28-35
Partially
9.5-27
No Support
Chrome Safari on iOS
High

Browser Support For Safari on iOS Versions

11-16.4
Fully
10-10.3
Partially
3.2-9
No Support
Chrome Android Browser
High

Browser Support For Android Browser Versions

97-111
Fully
-
Partially
2.1-4
No Support
Chrome Opera Mobile
High

Browser Support For Opera Mobile Versions

64-73
Fully
-
Partially
10-12
No Support
Chrome Chrome for Android
High

Browser Support For Chrome for Android Versions

97-111
Fully
-
Partially
-
No Support
Chrome Firefox for Android
High

Browser Support For Firefox for Android Versions

95-110
Fully
-
Partially
-
No Support
Chrome Samsung Internet
High

Browser Support For Samsung Internet Versions

5-20
Fully
4-4
Partially
-
No Support

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Last Modified date

2023-03-20

References


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