<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> </body> <script> function show() { console.log(this) } show(); //window object new show(); //object j = { name:'ldq', age:18, info:function () { console.log(`我的名字是${name},我的年龄是${age}`) console.log(123) } }; console.log(j); new j.info(); function show(name,age) { //系统偷偷替我们做了 // var this = new object(); this.name = name; this.age = age; this.fun1=function () { console.log(`我的名字是${this.name},我的年龄是${this.age}`) // /系统偷偷替我们做了 // return this } } obj = new show('ldq',18) obj.fun1() </script> </html>