Uint8Array.prototype.setFromHex()

Baseline 2025

20259

setFromHex() Uint8Array Uint8Array 16

parseInt() radix 16

setFromHex(string)

string

Uint8Array 16

read: 16 16
written: Uint8Array Uint8Array byteLength

SyntaxError: 16
TypeError

16

16 Uint8Array

const uint8Array = new Uint8Array(8);
const result = uint8Array.setFromHex("cafed00d");
console.log(result); // { read: 8, written: 4 }
console.log(uint8Array); // Uint8Array(8) [202, 254, 208, 13, 0, 0, 0, 0]

const uint8Array = new Uint8Array(4);
const result = uint8Array.setFromHex("cafed00d-some random stuff");
console.log(result); // { read: 8, written: 4 }
console.log(uint8Array); // Uint8Array(4) [202, 254, 208, 13]

setFromHex() Uint8Array TypedArray.prototype.subarray()

const uint8Array = new Uint8Array(8);
//  2 
const result = uint8Array.subarray(2).setFromHex("cafed00d");
console.log(result); // { read: 8, written: 4 }
console.log(uint8Array);
// Uint8Array(8) [0, 0, 202, 254, 208, 13, 0, 0]


ECMAScript 2027 LanguageSpecification # sec-uint8array.prototype.setfromhex

MDN

MDN 2026523

GitHub