In javascript the fastest way to reverse a string is to first create a Char array , then reverse the array then join it. In a recent project i wanted to revert strings and didn't want to duplicate "string value".split("").reverse().join(""); therefore i created a String.prototype so i can just call "string value".reverse();

reverse string prototype

String.prototype.reverse = function () {
    return this.split("").reverse().join("");
}