DataView.prototype.getUint8()

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 getUint8() method of DataView instances reads 1 byte at the specified byte offset of this DataView and interprets it as an 8-bit unsigned integer.

Try it

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

const view = new DataView(buffer);
view.setUint8(1, 255); // Max unsigned 8-bit integer

console.log(view.getUint8(1));
// Expected output: 255

Syntax

getUint8(byteOffset)

Parameters

byteOffset

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

Return value

An integer from 0 to 255, inclusive.

Exceptions

RangeError

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

Examples

Using getUint8()

js
const { buffer } = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
const dataview = new DataView(buffer);
console.log(dataview.getUint8(1)); // 1

Specifications

Specification

ECMAScript® 2027 Language Specification
# sec-dataview.prototype.getuint8

Browser compatibility

Enable JavaScript to view this browser compatibility table.

Help improve MDN

Was this page helpful to you?

Yes No

Learn how to contribute

This page was last modified on Jul 10, 2025 by MDN contributors.

View this page on GitHub • Report a problem with this content

Standard built-in objects
DataView
Constructor
1. DataView()
Instance methods
Instance properties
Inheritance
Object/Function
Static methods
Static properties
Instance methods
Instance properties
1. __proto__
2. constructor