javascript reverse string

1function reverseString(s){
2    return s.split("").reverse().join("");
3}
4reverseString("Hello");//"olleH"

1//more compact way: 
2"my example text".split("").reverse().join("");

1return str.split("").reverse().join("");

1function reverseString(str) {
2    return str.split("").reverse().join("");
3}
4reverseString("hello");

1function reverseString(str) {
2  if (str === "")
3    return "";
4  else
5    return reverseString(str.substr(1)) + str.charAt(0);
6}
7reverseString("hello");

1function reverseString(str) {
2    // Step 1. Create an empty string that will host the new created string
3    var newString = "";
4 
5    // Step 2. Create the FOR loop
6    /* The starting point of the loop will be (str.length - 1) which corresponds to the 
7       last character of the string, "o"
8       As long as i is greater than or equals 0, the loop will go on
9       We decrement i after each iteration */
10    for (var i = str.length - 1; i >= 0; i--) { 
11        newString += str[i]; // or newString = newString + str[i];
12    }
13    /* Here hello's length equals 5
14        For each iteration: i = str.length - 1 and newString = newString + str[i]
15        First iteration:    i = 5 - 1 = 4,         newString = "" + "o" = "o"
16        Second iteration:   i = 4 - 1 = 3,         newString = "o" + "l" = "ol"
17        Third iteration:    i = 3 - 1 = 2,         newString = "ol" + "l" = "oll"
18        Fourth iteration:   i = 2 - 1 = 1,         newString = "oll" + "e" = "olle"
19        Fifth iteration:    i = 1 - 1 = 0,         newString = "olle" + "h" = "olleh"
20    End of the FOR Loop*/
21 
22    // Step 3. Return the reversed string
23    return newString; // "olleh"
24}
25 
26reverseString('hello');