The byteLength accessor property represents the length of an ArrayBuffer in bytes.
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Syntax
arraybuffer.byteLength
Description
The byteLength property is an accessor property whose set accessor function is undefined, meaning that you can only read this property. The value is established when the array is constructed and cannot be changed. This property returns 0 if this ArrayBuffer has been detached.
Examples
var buffer = new ArrayBuffer(8); buffer.byteLength; // 8
Specifications
| Specification | Status | Comment |
|---|---|---|
| Typed Array Specification | Obsolete | Superseded by ECMAScript 2015. |
| ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'ArrayBuffer.prototype.byteLength' in that specification. |
Standard | Initial definition in an ECMA standard. |
| ECMAScript Latest Draft (ECMA-262) The definition of 'ArrayBuffer.prototype.byteLength' in that specification. |
Draft |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 7 | Yes | 4 | 10 | 11.6 | 5.1 |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | 4 | Yes | Yes | 4 | 11.6 | 4.2 | Yes |