SOURCE

console 命令行工具 X clear

                    
>
console
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title></title>
  </head>
  <body>
    <script>

        var str = "abcde";
        document.write(str.split('').reverse().join(''));     

    </script>
  </body>
</html>