DataView.prototype.setUint8()

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 setUint8() method of DataView instances takes a number and stores it as an 8-bit unsigned integer in the byte at the specified byte offset of this DataView.

Try it

Syntax

js
setUint8(byteOffset, value)

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.

Return value

undefined.

Exceptions

RangeError

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

Examples

Using setUint8()

js
const buffer = new ArrayBuffer(10);
const dataview = new DataView(buffer);
dataview.setUint8(0, 3);
dataview.getUint8(0); // 3

Specifications

Specification
ECMAScript Language Specification
# sec-dataview.prototype.setuint8

Browser compatibility

BCD tables only load in the browser

See also