The buffer accessor property of DataView instances returns the ArrayBuffer or SharedArrayBuffer referenced by this view at construction time.
Description
The buffer 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.
Examples
Using the buffer property
const buffer = new ArrayBuffer(8);
const dataview = new DataView(buffer);
dataview.buffer; // ArrayBuffer { byteLength: 8 }