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

var str = 'sample string';
[].map.call(str, function(x) {
  return x;
}).reverse().join('');

OR

var str = 'sample string';
console.log(str.split('').reverse().join(''));

// Output: 'gnirts elpmas'