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

OK, pretty simple, you can create a function with a simple loop to do the string reverse for you without using reverse(), charAt() etc like this:

For example you have this string:

var name = "StackOverflow";

Create a function like this, I call it reverseString...

function reverseString(str) {
  if(!str.trim() || 'string' !== typeof str) {
    return;
  }
  let l=str.length, s='';
  while(l > 0) {
    l--;
    s+= str[l];
  }
  return s;
}

And you can call it like:

reverseString(name);

And the result will be:

"wolfrevOkcatS"