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const

Declares a constant in multiple files without having to specify it repeatedly.

Last updated on : 2023-03-20

Browser Versions

Edge

Firefox

Chrome

Safari

Opera

5.5 - 10

11 - 11

12 - 111

2 - 35

36 - 113

4 - 48

49 - 114

3.2 - 10.1

11 - 16.4

9.5 - 9

10.5 - 35

36 - 95

Fully Supported

Partially

No Support

Specifications

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

Syntax

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

Browser Compatibility

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

const on Edge is fully supported on all Edge versions.

const on Firefox is fully supported on 36-113 and partially supported on 2-35 Firefox versions.

const on Chrome is fully supported on 49-114 and partially supported on 4-48 Chrome versions.

const on Safari is fully supported on 11-16.4 and partially supported on 3.2-10.1 Safari versions.

const on Opera is fully supported on 36-95, partially supported on 10.5-35, and not supported on 9.5-9 Opera versions.

const on Safari on iOS is fully supported on 11-16.4 and partially supported on 3.2-10.3 Safari on iOS versions.

const on Android Browser is fully supported on 97-111 and partially supported on 2.3-4 Android Browser versions.

const on Opera Mobile is fully supported on 64-73 and partially supported on 10-12 Opera Mobile versions.

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

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

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

Browser Support for const

const on Chrome

const on Safari

const on Firefox

const on Internet Explorer

const on Opera

const on Edge

References

Data sourced from

High

Overall Browser Compatibility Score

Note:const 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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