DataView.prototype.setInt8()

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 setInt8() method of DataView instances takes a number and stores it as an 8-bit signed integer in the byte at the specified byte offset of this DataView.

Try it

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

const view = new DataView(buffer);
view.setInt8(1, 127); // Max signed 8-bit integer

console.log(view.getInt8(1));
// Expected output: 127

Syntax

setInt8(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 setInt8()

const buffer = new ArrayBuffer(10);
const dataview = new DataView(buffer);
dataview.setInt8(0, 3);
dataview.getInt8(0); // 3

Specifications

Specification
ECMAScript® 2027 Language Specification # sec-dataview.prototype.setint8

Browser compatibility

	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	Bun	Deno	Node.js
`setInt8`	9	12	15	12.1	5.1	18	15	12.1	5	1.0	4	5	1.0.0	1.0	0.10.0