Reflect 

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>reflect</title>
  </head>
  <body>
    <script>
      // class Person {
      //   constructor(name, age) {
      //     this.name = name;
      //     this.age = age;
      //   }
      // }
      // let person1 = new Person('彭项崇', 29);
      // let person2 = Reflect.construct(Person, ['陈颖', 18]);
      // console.log(person1);
      // console.log(person2);

      // console.log(person1.__proto__);
      // console.log(person2.__proto__);
      // console.log(Object.getPrototypeOf(person1));
      // console.log(Object.getPrototypeOf(person2));
      // console.log(Reflect.getPrototypeOf(person1));
      // console.log(Reflect.getPrototypeOf(person2));

      // const obj = {
      //   age: 18
      // };
      // function fn(a, b, c) {
      //   return this.age + a + b + c;
      // }

      // console.log(fn.apply(obj, [1, 2, 3]));
      // console.log(Reflect.apply(fn, obj, [1, 2, 3]));

      const name = Symbol('name');
      let info = {
        name: '彭项崇',
        age: 29,
        Symbol: Symbol('1'),
        Symbol: Symbol('彭项崇'),
        [name]: '陈颖'
      };

      console.log(Object.getOwnPropertyNames(info));
      console.log(Object.getOwnPropertySymbols(info));
      console.log(Reflect.ownKeys(info));
    </script>
  </body>
</html>

 

posted @ 2022-05-04 20:44  苹果π  阅读(118)  评论(0)    收藏  举报