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@@ -0,0 +1,86 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+
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+<head>
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+ <meta charset="UTF-8">
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+ <meta http-equiv="X-UA-Compatible" content="IE=edge">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+</head>
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+
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+<body>
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+ <script>
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+ // var a = 1
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+ // var obj = {
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+ // a: 3,
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+ // fun: function () {
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+ // return () => { console.log(this.a) }
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+ // }
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+ // }
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+ // obj.fun()()
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+
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+ // 3 3 3
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+
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+
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+
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+
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+
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+
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+ // var a = 1
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+ // var obj = {
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+ // a: 3,
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+ // fun: () => {
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+ // return function () {
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+ // console.log(this.a)
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+ // }
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+ // }
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+ // }
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+ // obj.fun()()
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+ //3 3 3 3 1
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+
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+
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+
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+ var name = 'window'
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+ function Person(name) {
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+ this.name = name
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+ this.foo1 = function () {
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+ console.log(this.name);
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+ }
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+ this.foo2 = () => {
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+ console.log(this.name)
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+ }
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+ this.foo3 = function () {
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+ return function () {
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+ console.log(this.name);
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+ }
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+ }
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+ this.foo4 = function () {
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+ return () => {
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+ console.log(this.name);
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+ }
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+ }
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+ }
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+ var person1 = new Person('person1')
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+ var person2 = new Person('person2')
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+ person1.foo1() //p1
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+ person1.foo1.call(person2) //p2
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+ person1.foo2() // p1
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+ person1.foo2.call(person2)//p1
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+ person1.foo3()() //window
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+ person1.foo3.call(person2)() // window
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+ person1.foo3().call(person2) //p2
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+ person1.foo4()() // p1
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+ person1.foo4.call(person2)() // p2
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+ person1.foo4().call(person2) //p1
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+ //p1 p2 p1 p1 win win p2 p1 p2 p1
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+
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+
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+
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+
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+
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+
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+
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+ </script>
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+</body>
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+
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+</html>
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zsydgithub