DataView.prototype.getUint8() - JavaScript 编辑

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

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

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

BCD tables only load in the browser

See also

• DataView
• ArrayBuffer