reverse a string in Javascript

function reverseString(str) {
  let reversedStr = '';
  for (var i = str.length - 1; i >= 0; i--) {
    reversedStr += str[i];
  }
  return reversedStr;
}

This code takes a string as its argument (e.g. ‘hello’) and reverses the word. The first line creates an empty string (reversedStr) which will be used to store the reversed string. The second line uses a loop, starting from the end of the string, to add each character of the original string to the reversedStr. Finally, the reversed string is returned.