DataView.prototype.getInt8()

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.

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The getInt8() method of DataView instances reads 1 byte at the specified byte offset of this DataView and interprets it as an 8-bit signed integer.

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

getInt8(byteOffset)

Parameters

byteOffset: The offset, in bytes, from the start of the view to read the data from.

Return value

An integer from -128 to 127, inclusive.

Exceptions

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

Examples

Using getInt8()

const { buffer } = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
const dataview = new DataView(buffer);
console.log(dataview.getInt8(1)); // 1

Specifications

Specification
ECMAScript® 2025 Language Specification # sec-dataview.prototype.getint8

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
`getInt8`

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Full support: Full support

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