<!DOCTYPE html> <html> <head> <title>ExtJs</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <link rel="stylesheet" type="text/css" href="ExtJs/packages/ext-theme-crisp/build/resources/ext-theme-crisp-all.css"> <script type="text/javascript" src="ExtJs/ext-all.js"></script> <script type="text/javascript" src="ExtJs/bootstrap.js"></script> <script type="text/javascript" src="ExtJs/packages/ext-theme-crisp/build/ext-theme-crisp.js"></script> </head> <body> <script type="text/javascript"> function Person(){ this.name = 'hanzichi'; this.age = 10; } var num = 0; for (var i in Person.prototype) num++; console.log(num); Person.prototype.show = function(){ console.log(this.name); }; Person.prototype.sex = 'male'; var a = new Person(); console.log(a.sex); a.show(); console.log(a.__proto__ === Person.prototype); console.log(a.constructor === Person); console.log(Person.prototype.constructor === Person); console.log(Person.prototype); console.log(a); console.log('string'.constructor); console.log(new String('string').constructor); console.log(/hello/.constructor); console.log([1,2,3].constructor); function A() {} var a = new A() console.log(a.constructor); function Book(name){ this.name = name; }; Book.prototype.getName = function(){ return this.name; }; Book.prototype = { //constructor: Book, getPName: function(){ return this.name; } }; Book.prototype.constructor = Book; var b = new Book("ON THE WAY"); console.log(b.constructor === Book); console.log(Book.prototype.constructor === Book); console.log(b.constructor.prototype.constructor == Book); </script> <body> <div id="tpl-table"> <div>员工信息</div> </div> </body> </html>