Reverse a String in Javascript

 Write a program to reverse the string in javascript.

  Example:

Input: "beingcodeexpert"
Output: "trepxeedocgnieb"

Approach 1: Using iterative method
JavaScript 
var str='beingcodeexpert';

  if(!str || str.length < 2 ||  
      typeof str!== 'string') { 
  return 'Not valid';  
  } 
  const revArray = []; 
  const length = str.length - 1; 
  for(let i = length; i >= 0; i--) { 
  revArray.push(str[i]); 
  } 
  console.log(revArray.join(''));

Approach 2: Using reverse method

JavaScript 

    var str='beingcodeexpert';

    var revArr=str.split('').reverse().join('');

    console.log(revArr);