The byteLength accessor property represents the length of an ArrayBuffer in bytes.
arraybuffer.byteLength
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.
var buffer = new ArrayBuffer(8); buffer.byteLength; // 8
| 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| Typed Array Specification | Obsolete | Superseded by ECMAScript 2015.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 |
| 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 | ? |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/byteLength