How do you reverse a string in place in JavaScript?

Question

How do you reverse a string in place (or in-place) in JavaScript when it is passed to a function with a return statement, without using built-in functions (.reverse()<

Answer 1

In ECMAScript 6, you can reverse a string even faster without using .split('') split method, with the spread operator like so:

var str = [...'racecar'].reverse().join('');