The byteLength
accessor property of TypedArray instances returns the length (in bytes) of this typed array.
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 a TypedArray is constructed and cannot be changed. If the TypedArray is not specifying a byteOffset
or a length
, the length
of the referenced ArrayBuffer
will be returned. TypedArray is one of the TypedArray objects.
Examples
Using the byteLength property
const buffer = new ArrayBuffer(8);
const uint8 = new Uint8Array(buffer);
uint8.byteLength; // 8 (matches the byteLength of the buffer)
const uint8newLength = new Uint8Array(buffer, 1, 5);
uint8newLength.byteLength; // 5 (as specified when constructing the Uint8Array)
const uint8offSet = new Uint8Array(buffer, 2);
uint8offSet.byteLength; // 6 (due to the offset of the constructed Uint8Array)