How to reverse a string in less than four lines of code | javascript

Today I was solving my first algorithm challenge at FreeCodeCamp and I managed to solve from MDN web docs.
Here is the script:

function reverseString(str) {
  var str = str.split('').reverse().join('');
  return str;
}

reverseString("hello");

to preserve non-BMP codepoints mixed with unicode code points (emoji, etc).
read here Link

P.S: don't try to do this while your variables are declared as const it won't work :)