1 class User {
2 constructor(name, age) {
3 this.name = name;
4 this.age = age;
5 }
6
7 changeName(name) {
8 this.name = name;
9 }
10
11 changeAge(age) {
12 this.age = age;
13 }
14
15 chage(name, age) {
16
17 // 本this -> 获取的是全局的this
18 var self = this;
19 let fn = () => {
20 //无论嵌套多少层 -> 只要通过箭头符号获取的就是全局的
21 (() => {
22 (() => {
23 (() => {
24 console.log('全局this：', self);
25 this.changeAge(age);
26 this.changeName(name);
27 })();
28 })()
29 })()
30
31 console.log('全局this：', self);
32 this.changeAge(age);
33 this.changeName(name);
34 }
35
36 // function fn() {
37 // // 当前 - 带箭头 -> 全局
38 // this.changeAge(age);
39 // this.changeName(name);
40 // }
41
42 fn();
43 }
44
45
46 }
47
48 var user = new User('zhang', 30);
49 user.chage('long', 20);
50
51 console.log('chage修改后：', user);
52
53
54
55 // 函数 -es5
56 function calc(x, y) {
57 return x * y;
58 }
59
60 console.log(calc(1, 5));
61
62 // 函数 -es6
63 var es6calc = (x, y) => {
64 return x * y;
65 }
66
67 console.log(es6calc(1, 2));
