使用arguments模拟重载

    1. <!DOCTYPE html>
    2. <html lang="en">
    3. <head>
    4.     <meta charset="UTF-8">
    5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
    6.     <title>Document</title>
    7. </head>
    8. <body>
    9.     <script>
    10.         // 使用arguments模拟重载
    11.         function go(){
    12.             if(arguments.length == 1){
    13.                 console.log(arguments[0])
    14.             }else if(arguments.length == 2){
    15.                 console.log(arguments[0]+arguments[1])
    16.             }
    17.         }
    18.         go(1)
    19.         go(10,20)
    20.     </script>
    21. </body>
    22. </html>

    1.PNG