DataView.prototype.buffer
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The buffer accessor property of DataView instances returns the ArrayBuffer or SharedArrayBuffer referenced by this view at construction time.
Try it
// Create an ArrayBuffer
const buffer = new ArrayBuffer(123);
// Create a view
const view = new DataView(buffer);
console.log(view.buffer.byteLength);
// Expected output: 123
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
js
const buffer = new ArrayBuffer(8);
const dataview = new DataView(buffer);
dataview.buffer; // ArrayBuffer { byteLength: 8 }
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-get-dataview.prototype.buffer |
Browser compatibility
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