JSFiddle - React, Tailwind, and code Playground

JavaScript

function bytesFromWords (string) {
    var bytes = [];
    for(var i = 0; i < string.length; i++) {
        var char = string.charCodeAt(i);
        bytes.push(char >>> 8);
        bytes.push(char & 0xFF);
    }
    return bytes;
}

var string = bytesFromWords('teste soPT');

console.log(string); //array
console.log(string.toString()); //array string
console.log(string.toString().split(',')); //revertendo?

array_novo=[];
for(i=0;i<string.toString().split(',').length;i++)
{
   array_novo.push(parseInt(string.toString().split(',')[i]));
}
console.log(array_novo);