


A brief discussion on static attributes and prototype attributes of Javascript_javascript skills
This article will introduce you to an example of Javascript’s static methods and prototype methods. If you don’t understand Javascript’s static methods and prototype methods, you can take a look with the editor. A piece of code to understand static methods and instance methods:
<script> //对象构造函数 function Atest(name){ //私有属性,只能在对象构造函数内部使用 var className = "Atest"; //公有属性,在对象实例化后调用 this.name = name; //对象方法 this.hello = function(){ alert(this.name); alert(this.msg());//使用原型方法扩充的方法可以在类内部使用 alert(this.sex);//使用原型方法扩充的属性可以在类内部使用 alert(Atest.age);//静态属性调用时格式为[对象.静态属性] } } //类方法 (实际是静态方法直接调用) 位置:Person类的外部 语法格式:类名称.方法名称 = function([参数...]){ 语句行; } Atest.Run = function(){ alert("我是类方法 Run"); } //原型方法 Atest.prototype.msg = function(){ alert("我的名字是:"+this.name);//如果原型方法当作静态方法直接调用时,this.name无法被调用 } //公有静态属性 在类的外部 Atest.age = 20;//公有静态属性不能使用 【this.属性】,只能使用 【对象.属性】 调用 //原型属性,当作是类内部的属性使用【this.原型属性】,也可以当成公有静态属性使用【对象.prototype.原型属性】 Atest.prototype.sex = "男"; Atest.Run(); //类方法也是静态方法,可以直接使用 【对象.静态方法()】 Atest.prototype.msg();//原型方法当成静态方法使用时【对象.prototype.方法()】 alert(Atest.prototype.sex);//原型属性当作静态属性使用时【对象.prototype.方法()】 var a = new Atest("zhangsan");//对象方法和原型方法需要实例化对象后才可以使用 a.hello();//对象方法必须实例化对象 a.msg();//原型方法必须实例化对象 alert(a.age)://错误,公有静态属性只能使用 【对象.属性】调用 //ps:尽量将方法定义为原型方法,原型方法避免了每次调用构造函数时对属性或方法的构造,节省空间,创建对象快. </script>

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

How to use WebSocket and JavaScript to implement an online speech recognition system Introduction: With the continuous development of technology, speech recognition technology has become an important part of the field of artificial intelligence. The online speech recognition system based on WebSocket and JavaScript has the characteristics of low latency, real-time and cross-platform, and has become a widely used solution. This article will introduce how to use WebSocket and JavaScript to implement an online speech recognition system.

WebSocket and JavaScript: Key technologies for realizing real-time monitoring systems Introduction: With the rapid development of Internet technology, real-time monitoring systems have been widely used in various fields. One of the key technologies to achieve real-time monitoring is the combination of WebSocket and JavaScript. This article will introduce the application of WebSocket and JavaScript in real-time monitoring systems, give code examples, and explain their implementation principles in detail. 1. WebSocket technology

How to use WebSocket and JavaScript to implement an online reservation system. In today's digital era, more and more businesses and services need to provide online reservation functions. It is crucial to implement an efficient and real-time online reservation system. This article will introduce how to use WebSocket and JavaScript to implement an online reservation system, and provide specific code examples. 1. What is WebSocket? WebSocket is a full-duplex method on a single TCP connection.

Introduction to how to use JavaScript and WebSocket to implement a real-time online ordering system: With the popularity of the Internet and the advancement of technology, more and more restaurants have begun to provide online ordering services. In order to implement a real-time online ordering system, we can use JavaScript and WebSocket technology. WebSocket is a full-duplex communication protocol based on the TCP protocol, which can realize real-time two-way communication between the client and the server. In the real-time online ordering system, when the user selects dishes and places an order

JavaScript tutorial: How to get HTTP status code, specific code examples are required. Preface: In web development, data interaction with the server is often involved. When communicating with the server, we often need to obtain the returned HTTP status code to determine whether the operation is successful, and perform corresponding processing based on different status codes. This article will teach you how to use JavaScript to obtain HTTP status codes and provide some practical code examples. Using XMLHttpRequest

JavaScript and WebSocket: Building an efficient real-time weather forecast system Introduction: Today, the accuracy of weather forecasts is of great significance to daily life and decision-making. As technology develops, we can provide more accurate and reliable weather forecasts by obtaining weather data in real time. In this article, we will learn how to use JavaScript and WebSocket technology to build an efficient real-time weather forecast system. This article will demonstrate the implementation process through specific code examples. We

Introduction to the method of obtaining HTTP status code in JavaScript: In front-end development, we often need to deal with the interaction with the back-end interface, and HTTP status code is a very important part of it. Understanding and obtaining HTTP status codes helps us better handle the data returned by the interface. This article will introduce how to use JavaScript to obtain HTTP status codes and provide specific code examples. 1. What is HTTP status code? HTTP status code means that when the browser initiates a request to the server, the service

Usage: In JavaScript, the insertBefore() method is used to insert a new node in the DOM tree. This method requires two parameters: the new node to be inserted and the reference node (that is, the node where the new node will be inserted).
