DataView.prototype.setUint16()

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.

We'd love to hear more about your role and the company you work for

Please help us by answering a few questions.

The setUint16() method of DataView instances takes a number and stores it as a 16-bit unsigned integer in the 2 bytes starting at the specified byte offset of this DataView. There is no alignment constraint; multi-byte values may be stored at any offset within bounds.

Try it

// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);

const view = new DataView(buffer);
view.setUint16(1, 65535); // Max unsigned 16-bit integer

console.log(view.getUint16(1));
// Expected output: 65535

Syntax

setUint16(byteOffset, value)
setUint16(byteOffset, value, littleEndian)

Parameters

byteOffset: The offset, in bytes, from the start of the view to store the data in.
value: The value to set. For how the value is encoded in bytes, see Value encoding and normalization.
littleEndian Optional: Indicates whether the data is stored in little- or big-endian format. If false or undefined, a big-endian value is written.

Return value

undefined.

Exceptions

RangeError: Thrown if the byteOffset is set such that it would store beyond the end of the view.

Examples

Using setUint16()

const buffer = new ArrayBuffer(10);
const dataview = new DataView(buffer);
dataview.setUint16(0, 3);
dataview.getUint16(1); // 768

Specifications

Specification
ECMAScript® 2025 Language Specification # sec-dataview.prototype.setuint16

Browser compatibility

Report problems with this compatibility data on GitHub

	desktop					mobile							server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS	Deno	Node.js
`setUint16`

Tip: you can click/tap on a cell for more information.

Full support: Full support

Legend