Prototype.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Prototype</title>
  </head>
  <body></body>
  <script>
    let initial = {
        age: 0
      },
      real = Object.create(initial);
    console.log(real.age); // 0
    initial.age = 1;
    console.log(real.age); // 1
    real.age = 2;
    console.log(initial.age); // 1
    let other = Object.create(initial); // 创建一个“新”对象并把新对象内部的 Prototype 关联到你指定的对象
    console.log(other);
    let another = {};
    Object.setPrototypeOf(another, other);
    console.log(another);
    console.log(other.isPrototypeOf(another)); // true
    console.log(initial.isPrototypeOf(another)); // true
    console.log(Object.prototype.isPrototypeOf(another)); // true
    console.log(Object.getPrototypeOf(another) === other); // true
    /*
        Object.defineProperty(Object.prototype, "__proto__", {
            get() {
                return Object.getPrototypeOf(this);
            },
            set(o) {
                Object.setPrototypeOf(this, o);
                return o;
            }
        });    
    */
  </script>
</html>