Web/JavaScript/Reference/Global objects/TypedArray/byteOffset

The byteOffset accessor property represents the offset (in bytes) of a typed array from the start of its ArrayBuffer.

Description

The byteOffset 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. TypedArray is one of the TypedArray objects.

Examples

Using the byteOffset property

var buffer = new ArrayBuffer(8);

var uint8 = new Uint8Array(buffer);
uint8.byteOffset; // 0 (no offset specified)

var uint8 = new Uint8Array(buffer, 3);
uint8.byteOffset; // 3 (as specified when constructing Uint8Array)

Specifications

Specification
[(ECMA-262)The definition of 'TypedArray.prototype.byteOffset' 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
`byteOffset`	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