Web/JavaScript/Reference/Global objects/DataView/getUint8

The getUint8() method gets an unsigned 8-bit integer (unsigned byte) at the specified byte offset from the start of the DataView.

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Syntax

dataview.getUint8(byteOffset)

Parameters

byteOffset

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

Return value

An unsigned 8-bit integer number.

Errors thrown

RangeError

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

Description

There is no alignment constraint; multi-byte values may be fetched from any offset.

Examples

Using the getUint8 method

var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.getUint8(1); // 0

Specifications

Specification
ECMAScript (ECMA-262)The definition of 'DataView.prototype.getUint8' in that specification.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
getUint8	Chrome Full support 9	Edge Full support 12	Firefox Full support 15	IE Full support 10	Opera Full support 12.1	Safari Full support 5.1	WebView Android Full support 4	Chrome Android Full support 18	Firefox Android Full support 15	Opera Android Full support 12.1	Safari iOS Full support 4.2	Samsung Internet Android Full support 1.0	nodejs Full support 0.10

Legend

Full support  

Full support

See also

• DataView
• ArrayBuffer

DataView.prototype.getUint8() by Mozilla Contributors is licensed under CC-BY-SA 2.5.