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
js
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
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)); // 1
Specifications
| Specification |
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| ECMAScript® 2027 Language Specification # sec-dataview.prototype.getuint8 |
Browser compatibility
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getUint8
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Legend
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- Full support
- Full support