inplace-reversal.js

function reverse(stringOfChars) {
  
	// split string into an array: 'abc'.split('') => ['a', 'b', 'c']
  let arrayOfChars = stringOfChars.split('')
  
  let indexLeft = 0;
  let indexRight = arrayOfChars.length - 1;

  while (indexLeft < indexRight) {

    // Swap characters
    const swap = arrayOfChars[indexLeft];
    arrayOfChars[indexLeft] = arrayOfChars[indexRight];
    arrayOfChars[indexRight] = temp;

    // Move towards middle
    indexLeft++, indexRight--;
  }
  return arrayOfChars.join('')
}