Web/JavaScript/Reference/Global objects/TypedArray/includes

The includes() method determines whether a typed array includes a certain element, returning true or false as appropriate. This method has the same algorithm as Array.prototype.includes(). TypedArray is one of the typed array types here.

Syntax

typedarray.includes(searchElement[, fromIndex]);

Parameters

searchElement: The element to search for.
fromIndex: Optional. The position in this array at which to begin searching for searchElement; defaults to 0.

Return value

A Boolean.

Examples

Using includes

var uint8 = new Uint8Array([1,2,3]);
uint8.includes(2);     // true
uint8.includes(4);     // false
uint8.includes(3, 3);  // false

// NaN handling (only true for Float32 and Float64)
new Uint8Array([NaN]).includes(NaN); // false, since the NaN passed to the constructor gets converted to 0
new Float32Array([NaN]).includes(NaN); // true;
new Float64Array([NaN]).includes(NaN); // true;

Specifications

Specification
[(ECMA-262)The definition of 'TypedArray.prototype.includes' in that specification.]

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
`includes`	Chrome Full support 47	Edge Full support 14	Firefox Full support 43	IE No support No	Opera Full support 34	Safari Full support 10	WebView Android No support No	Chrome Android Full support 47	Firefox Android Full support 43	Opera Android Full support 34	Safari iOS Full support 10	Samsung Internet Android Full support 5.0	nodejs Full support 6.0.0 Full support 6.0.0 Full support 5.0.0 Disabled' Disabled' From version 5.0.0: this feature is behind the `--harmony` runtime flag.

Legend

Full support: Full support
No support: No support
User must explicitly enable this feature.': User must explicitly enable this feature.