Web/JavaScript/Reference/Global objects/TypedArray/length

From Get docs


The length accessor property represents the length (in elements) of a typed array.


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Description

The length property is an accessor property whose set accessor function is undefined, meaning that you can only read this property. The value is established when a TypedArray is constructed and cannot be changed. If the TypedArray is not specifying an byteOffset or a length, the length of the referenced ArrayBuffer will be returned. TypedArray is one of the TypedArray objects.

Examples

Using the length property

var buffer = new ArrayBuffer(8);

var uint8 = new Uint8Array(buffer);
uint8.length; // 8 (matches the length of the buffer)

var uint8 = new Uint8Array(buffer, 1, 5);
uint8.length; // 5 (as specified when constructing the Uint8Array)

var uint8 = new Uint8Array(buffer, 2);
uint8.length; // 6 (due to the offset of the constructed Uint8Array)

Specifications

Specification
[(ECMA-262)The definition of 'TypedArray.prototype.length' 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
length Chrome

Full support 7

Edge

Full support 14

Firefox

Full support 4

IE

Full support 10

Opera

Full support 11.6

Safari

Full support 5.1

WebView Android

Full support 4

Chrome Android

Full support 18

Firefox Android

Full support 4

Opera Android

Full support 12

Safari iOS

Full support 4.2

Samsung Internet Android

Full support 1.0

nodejs

Full support 0.10

Legend

Full support  
Full support


See also

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