W3cubDocs

/JavaScript

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

Browser compatibilityUpdate compatibility data on GitHub

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

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/includes