Reverse a string in JavaScript

JavaScript arrays can be easily reversed by using the .reverse() array method. Unfortunately such a method does not exist for strings in JavaScript. This .reverse() method for arrays does prove to be useful when needing to reverse a string as well however.

In order to reverse a string we can first split it into an array for single characters, then reverse the array and finally glue it back together using the .join() method.

let str = "stressed";

str = str.split("");
//=>  ['s', 't', 'r', 'e', 's', 's', 'e', 'd']

str.reverse();
//=> ['d', 'e', 's', 's', 'e', 'r', 't', 's']

str = str.join("");
//=> "desserts"

Note that the .reverse() method reverses the array in-place. Therefor there is no need to do a reassignment as we do with .split() and .join().

We can chain these method calls together into a one-liner as well:

let str = "stressed".split("").reverse().join("");
//=> "desserts"