DataView.prototype.byteOffset

The byteOffset accessor property of DataView instances returns the offset (in bytes) of this view 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 the DataView is constructed and cannot be changed. However, the byteOffset becomes 0 if the underlying buffer is resized such that the viewed range is no longer valid.