files/en-us/web/javascript/reference/global_objects/dataview/buffer/index.md

metadata

title: DataView.prototype.buffer
short-title: buffer
slug: Web/JavaScript/Reference/Global_Objects/DataView/buffer
page-type: javascript-instance-accessor-property
browser-compat: javascript.builtins.DataView.buffer
sidebar: jsref

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")}}

// 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

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")}}