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Array.prototype.findIndex

The method of findIndex returns an index of the 1st element in the array which aceepts the testing function provided.

Last updated on : 2023-03-20

Browser Versions

Edge

Firefox

Chrome

Safari

Opera

5.5 - 11

12 - 111

2 - 24

25 - 113

4 - 44

45 - 114

3.2 - 7

7.1 - 16.4

9.5 - 31

32 - 95

Fully Supported

Partially

No Support

Specifications

ECMAScript Language Specification # sec-array.prototype.findindex

Syntax

// Arrow function findIndex((element) => { /* ... */
 } ) findIndex((element, index) => { /* ... */
 } ) findIndex((element, index, array) => { /* ... */
 } ) // Callback function findIndex(callbackFn) findIndex(callbackFn, thisArg) // Inline callback function findIndex(function(element) { /* ... */
 }) findIndex(function(element, index) { /* ... */
 }) findIndex(function(element, index, array){ /* ... */
 }) findIndex(function(element, index, array) { /* ... */
 }, thisArg)

Browser Compatibility

Array.prototype.findIndex on IE is not supported on any IE versions.

Array.prototype.findIndex on Edge is fully supported on all Edge versions.

Array.prototype.findIndex on Firefox is fully supported on 25-113, and not supported on 2-24 Firefox versions.

Array.prototype.findIndex on Chrome is fully supported on 45-114, and not supported on 4-44 Chrome versions.

Array.prototype.findIndex on Safari is fully supported on 7.1-16.4, and not supported on 3.2-7 Safari versions.

Array.prototype.findIndex on Opera is fully supported on 32-95, and not supported on 9.5-31 Opera versions.

Array.prototype.findIndex on Safari on iOS is fully supported on 8.1-16.4, and not supported on 3.2-7 Safari on iOS versions.

Array.prototype.findIndex on Android Browser is fully supported on 97-111, and not supported on 2.1-4 Android Browser versions.

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

Array.prototype.findIndex on Chrome for Android is fully supported on all Chrome for Android versions.

Array.prototype.findIndex on Firefox for Android is fully supported on all Firefox for Android versions.

Array.prototype.findIndex on Samsung Internet is fully supported on 5-20, and not supported on 4-4 Samsung Internet versions.

Browser Support for Array.prototype.findIndex

Array.prototype.findIndex on Chrome

Array.prototype.findIndex on Safari

Array.prototype.findIndex on Firefox

Array.prototype.findIndex on Internet Explorer

Array.prototype.findIndex on Opera

Array.prototype.findIndex on Edge

References

Data sourced from

High

Overall Browser Compatibility Score

Note:Array.prototype.findIndex shows a browser compatibility score of 92. 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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