File size: 1,542 Bytes
780c9fe |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 |
---
title: DataView.prototype.getUint8()
short-title: getUint8()
slug: Web/JavaScript/Reference/Global_Objects/DataView/getUint8
page-type: javascript-instance-method
browser-compat: javascript.builtins.DataView.getUint8
sidebar: jsref
---
The **`getUint8()`** method of {{jsxref("DataView")}} instances reads 1 byte at the specified byte offset of this `DataView` and interprets it as an 8-bit unsigned integer.
{{InteractiveExample("JavaScript Demo: DataView.prototype.getUint8()")}}
```js interactive-example
// 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-nolint
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
- {{jsxref("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
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- [JavaScript typed arrays](/en-US/docs/Web/JavaScript/Guide/Typed_arrays) guide
- {{jsxref("DataView")}}
- {{jsxref("ArrayBuffer")}}
- {{jsxref("Uint8Array")}}
|