lovecoding
/
VIP28


			
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							<!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>Document</title>
</head>

<body>
  <script>
    // var a = 1
    // var obj = {
    //   a: 3,
    //   fun: function () {
    //     return () => { console.log(this.a) }
    //   }
    // }
    // obj.fun()()

    // 3  3  3


    // var a = 1
    // var obj = {
    //   a: 3,
    //   fun: () => {
    //     return function () {
    //       console.log(this.a)
    //     }
    //   }
    // }
    // obj.fun()()
    //3  3  3  3  1


    var name = 'window'
    function Person(name) {
      this.name = name
      this.foo1 = function () {
        console.log(this.name);
      }
      this.foo2 = () => {
        console.log(this.name)
      }
      this.foo3 = function () {
        return function () {
          console.log(this.name);
        }
      }
      this.foo4 = function () {
        return () => {
          console.log(this.name);
        }
      }
    }
    var person1 = new Person('person1')
    var person2 = new Person('person2')
    person1.foo1() //p1
    person1.foo1.call(person2) //p2
    person1.foo2() // p1 
    person1.foo2.call(person2)//p1
    person1.foo3()() //window
    person1.foo3.call(person2)() // window
    person1.foo3().call(person2) //p2 
    person1.foo4()() // p1 
    person1.foo4.call(person2)() // p2
    person1.foo4().call(person2) //p1
    //p1 p2 p1 p1 win win p2 p1 p2 p1


  </script>
</body>

</html>