<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <script type="text/javascript"> var name = 'this is window'; //定义window的name属性 function getName(){ console.log(this); //控制台输出: Window //this指向的是全局对象--window对象 console.log(this.name); //控制台输出: this is window / } getName(); //相当 window window.getName(); </script> </body> </html>