How to convert a hexadecimal string of data to an ArrayBuffer in JavaScript

Question

How do I convert the string 'AA5504B10000B5' to an ArrayBuffer?

Answer 1

You could use regular expressions together with Array#map and parseInt(string, radix):

var hex = 'AA5504B10000B5'

var typedArray = new Uint8Array(hex.match(/[\da-f]{2}/gi).map(function (h) {
  return parseInt(h, 16)
}))

console.log(typedArray)
console.log([0xAA, 0x55, 0x04, 0xB1, 0x00, 0x00, 0xB5])

var buffer = typedArray.buffer

Answer 2

Compact one-liner version:

new Uint8Array('AA5504B10000B5'.match(/../g).map(h=>parseInt(h,16))).buffer