The byteOffset accessor property of TypedArray instances returns the offset (in bytes) of this typed array from the start of its ArrayBuffer or SharedArrayBuffer.


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.


Using the byteOffset property

const buffer = new ArrayBuffer(8);

const uint8array1 = new Uint8Array(buffer);
uint8array1.byteOffset; // 0 (no offset specified)

const uint8array2 = new Uint8Array(buffer, 3);
uint8array2.byteOffset; // 3 (as specified when constructing Uint8Array)


Browser compatibility

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byteOffset 7 12 4 10 11.6 5.1 4 18 4 12 4.2 1.0 1.0 0.10.0

See also

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