The includes() method of TypedArray instances determines whether a typed array includes a certain value among its entries, returning true or false as appropriate. This method has the same algorithm as Array.prototype.includes().
TypedArray.prototype.includes()
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Syntax
js
includes(searchElement)
includes(searchElement, fromIndex)
Parameters
-
searchElement -
The value to search for.
fromIndexOptional-
Zero-based index at which to start searching, converted to an integer.
Return value
A boolean value which is true if the value searchElement is found within the typed array (or the part of the typed array indicated by the index fromIndex, if specified).
Description
See Array.prototype.includes() for more details. This method is not generic and can only be called on typed array instances.
Examples
Using includes()
js
const 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 compatibility
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | Deno | Node.js | ||
includes |
47 | 14 | 43 | 34 | 10 | 47 | 43 | 34 | 10 | 5.0 | 47 | 1.0 | 6.0.0 | |
See also
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/includes