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let

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.

Last updated on : 2023-03-20

Browser Versions

Edge

Firefox

Chrome

Safari

Opera

5.5 - 10

11 - 11

12 - 111

2 - 43

44 - 113

4 - 40

41 - 48

49 - 114

3.2 - 9

10 - 10.1

11 - 16.4

9.5 - 27

28 - 35

36 - 95

Fully Supported

Partially

No Support

Specifications

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

Syntax

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

Browser Compatibility

let on IE is partially supported on 11-11, and not supported on 5.5-10 IE versions.

let on Edge is fully supported on all Edge versions.

let on Firefox is fully supported on 44-113, 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, and not supported on 2.1-4 Android Browser versions.

let on Opera Mobile is fully supported on 64-73, and not supported on 10-12 Opera Mobile versions.

let on Chrome for Android is fully supported on all Chrome for Android versions.

let on Firefox for Android is fully supported on all Firefox for Android versions.

let on Samsung Internet is fully supported on 5-20 and partially supported on 4-4 Samsung Internet versions.

Browser Support for let

let on Chrome

let on Safari

let on Firefox

let on Internet Explorer

let on Opera

let on Edge

References

Data sourced from

High

Overall Browser Compatibility Score

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.

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