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.
ThegetUint8() method ofDataView instances reads 1 byte at the specified byte offset of thisDataView and interprets it as an 8-bit unsigned integer.
Try it
// Create an ArrayBuffer with a size in bytesconst buffer = new ArrayBuffer(16);const view = new DataView(buffer);view.setUint8(1, 255); // Max unsigned 8-bit integerconsole.log(view.getUint8(1));// Expected output: 255Syntax
js
getUint8(byteOffset)Parameters
byteOffsetThe offset, in bytes, from the start of the view to read the data from.
Return value
An integer from 0 to 255, inclusive.
Exceptions
RangeErrorThrown if the
byteOffsetis 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)); // 1Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-dataview.prototype.getuint8 |