typedArray.byteOffset

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

Syntax

typedarray.byteOffset

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	Status	Comment
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'TypedArray.prototype.byteOffset' in that specification.	Standard	Initial definition.
ECMAScript 2017 Draft (ECMA-262) The definition of 'TypedArray.prototype.byteOffset' in that specification.	Draft

Browser compatibility

See also

• JavaScript typed arrays
• TypedArray