| [ Web Proxy ] |
| Viewing: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView/setUint8 | [Back] [Original] |
Get to know MDN better
This feature is well established and works across many devices and browser versions. Its been available across browsers since July 2015.
The setUint8() method of DataView instances takes a number and stores it as an 8-bit unsigned integer in the byte at the specified byte offset of this DataView.
// 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
setUint8(byteOffset, value)
byteOffsetThe offset, in bytes, from the start of the view to store the data in.
valueThe value to set. For how the value is encoded in bytes, see Value encoding and normalization.
RangeErrorThrown if the byteOffset is set such that it would store beyond the end of the view.
const buffer = new ArrayBuffer(10);
const dataview = new DataView(buffer);
dataview.setUint8(0, 3);
dataview.getUint8(0); // 3
| Specification |
|---|
| ECMAScript 2027 LanguageSpecification # sec-dataview.prototype.setuint8 |
This page was last modified on Jul 10, 2025 by MDN contributors.
DataViewObject/FunctionYour blueprint for a better internet.
Portions of this content are 19982026 by individual mozilla.org contributors. Content available under a Creative Commons license.
| Web Proxy Viewer | New URL | Original Page |