js原生设计模式——2面向对象编程之闭包1

2022-04-16 01:28:12

<!DOCTYPE html>
<html lang="en">
<head>
   <meta charset="UTF-8">
   <title>closure</title>
   <script type="text/javascript">
   function fn(){
       var n = '123';
       return function(){
           console.log(n);
       }
   }
   var a = fn();//把返回值匿名函数给a
   a();//调用a就是调用fn中返回的匿名函数
   //本例已经通过验证
   </script>
</head>
<body>

</body>
</html>