JSFiddle - React, Tailwind, and code Playground

JavaScript

var array = new Uint8Array(3);
array[0] = 0xe2;
array[1] = 0x82;
array[2] = 0xac;

function uintToString(uintArray) {
    var encodedString = String.fromCharCode.apply(null, uintArray),
        decodedString = decodeURIComponent(escape(encodedString));
    return decodedString;
}

console.log(uintToString(array)); // €