Proxy_1.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
  <script>
      //Proxy 有两个参数，第一个是目标对象，第二个参数是设置Proxy的代理拦截方法
      var obj = new Proxy({}, {
          get: function (target, key, receiver) {
              console.log(`getting ${key}!`);
              return Reflect.get(target, key, receiver);
          },
          set: function (target, key, value, receiver) {
              console.log(`setting ${key}!`);
              return Reflect.set(target, key, value, receiver);
          }
      });
      obj.count = 1;
      obj.count
      //  setting count!
//      ++obj.count
  </script>
</body>
</html>