DataView.prototype.buffer

The buffer accessor property of {{jsxref("DataView")}} instances returns the {{jsxref("ArrayBuffer")}} or {{jsxref("SharedArrayBuffer")}} referenced by this view at construction time.

{{InteractiveExample("JavaScript Demo: DataView.prototype.buffer")}}

```js interactive-example // 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#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("DataView")}}
• {{jsxref("ArrayBuffer")}}
• {{jsxref("SharedArrayBuffer")}}