Reverse Broken Down

reverseBrokenDown.js

function reverse(str){
    // if we arrive at the final character of the string, return that character
    if (str.length === 1) return str[0];
    //otherwise return the last character of the string, plus the reverse function called on a sliced version of that string
    return str[str.length - 1] + reverse(str.slice(0, str.length - 1))
}

//1st Call returns "r" +  reverse("ba")  
//2nd call                "a" + reverse("b")
//3rd Call                          "b"
//returns     "r"      +  "a" +     "b"