翻转字符串

// reverse 
var name = "My city is WH"; 
var resultStr = name.split('').reverse().join(''); 
console.log(resultStr);  // HW si ytic yM

// charAt 
var name = "My city is WuHan";  
var nameArr = name.split('');  
var resultStr = '';  
for (var i = nameArr.length-1; i >= 0; i--) {     
 resultStr += name.charAt(i);  
 }  
 console.log(resultStr); // naHuW si ytic yM