Home Web Front-end JS Tutorial JavaScript appearance mode

JavaScript appearance mode

Nov 27, 2017 pm 02:15 PM
javascript js Exterior

This time I will tell you about the design concept of JS and what aspects need to be paid attention to. The corresponding chapters will be updated one after another. Everyone is welcome to make suggestions. We have said before Single case mode. If you are interested, you can check it out .

Note

JavaScriptDesign patternSeries github address

In-depth series of articles are in order, according to Directory structure Sequential reading works best.

Correction and Questions

If you have any questions or find errors, you can ask questions or make corrections in the corresponding issues.

Appearance mode

Concept:

Provide a higher-level unified interface for a complex set of sub-system interfaces,

This interface makes it easier to access the subsystem interface

The appearance mode is also called the facade mode

Case embodiment

There is a requirement to bind the document element For a click event, we need to consider browser compatibility issues at this time, but it is obviously not very reasonable to judge some browser compatibility every time we bind an event. At this time we have to use appearance mode, encapsulation A unified method for binding events, and then doing browser compatibility processing in this method, and uniformly exposing a method for binding external events,
This is what we call the appearance mode

Code reflection

// Appearance mode implementation function addEvent(dom, type, fn){ // For browsers that support dom2-level event handler addEventListener method if(dom.addEventListener){ dom.addEventListener(type,fn,false); }else if(dom.attachEvent){// For browsers that do not support the addEventListener method but support the attachEvent method dom.attachEvent('on'+type,fn); }else { dom['on'+ type] = fn; } } // Call the binding event addEvent(document.getElementById('btn'),'click',function(){ console.log('I am a click event'); });

Advantages of Appearance Mode

Provides a unified external interface, handles complex logic in a unified manner, and makes external calls easier

Summary of Appearance Mode

In javascript, appearance mode is relatively easy to understand. jQuery uses this

idea to solve browser compatibility issues

I believe you have already read these cases After mastering the method, please pay attention to other related articles on the php Chinese website for more exciting content!


Related reading:

How to deal with CSS web page misalignment

How to create the loading effect of CSS3

How to create a butterfly flying animation with CSS3

The above is the detailed content of JavaScript appearance mode. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

iPhone 17 appearance exposed iPhone 17 appearance exposed Jun 27, 2024 pm 06:40 PM

The iPhone 16 has not yet been released, but the latest news about the iPhone 17 is emerging. Recently, the iPhone 17 major revision has been exposed, and real pictures have been revealed. The cool body design is stunning and should not be missed by interested friends. iPhone 17 Appearance Exposed Foreign media recently exposed a set of iPhone 17 concept designs, which are stunning. It uses three horizontal cameras, similar to the shape of Google Pixel mobile phones, and the screen is similar to the one previously exposed. It implements under-screen 3D face recognition and shrinks the capsule shape. If next year’s new iPhone turns out to be exactly as shown in the design drawings, one can’t help but feel that Apple is lacking in sincerity. The appearance of Apple mobile phones in the past few years is basically

How to implement an online speech recognition system using WebSocket and JavaScript How to implement an online speech recognition system using WebSocket and JavaScript Dec 17, 2023 pm 02:54 PM

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.

Recommended: Excellent JS open source face detection and recognition project Recommended: Excellent JS open source face detection and recognition project Apr 03, 2024 am 11:55 AM

Face detection and recognition technology is already a relatively mature and widely used technology. Currently, the most widely used Internet application language is JS. Implementing face detection and recognition on the Web front-end has advantages and disadvantages compared to back-end face recognition. Advantages include reducing network interaction and real-time recognition, which greatly shortens user waiting time and improves user experience; disadvantages include: being limited by model size, the accuracy is also limited. How to use js to implement face detection on the web? In order to implement face recognition on the Web, you need to be familiar with related programming languages ​​and technologies, such as JavaScript, HTML, CSS, WebRTC, etc. At the same time, you also need to master relevant computer vision and artificial intelligence technologies. It is worth noting that due to the design of the Web side

WebSocket and JavaScript: key technologies for implementing real-time monitoring systems WebSocket and JavaScript: key technologies for implementing real-time monitoring systems Dec 17, 2023 pm 05:30 PM

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

Essential tools for stock analysis: Learn the steps to draw candle charts with PHP and JS Essential tools for stock analysis: Learn the steps to draw candle charts with PHP and JS Dec 17, 2023 pm 06:55 PM

Essential tools for stock analysis: Learn the steps to draw candle charts in PHP and JS. Specific code examples are required. With the rapid development of the Internet and technology, stock trading has become one of the important ways for many investors. Stock analysis is an important part of investor decision-making, and candle charts are widely used in technical analysis. Learning how to draw candle charts using PHP and JS will provide investors with more intuitive information to help them make better decisions. A candlestick chart is a technical chart that displays stock prices in the form of candlesticks. It shows the stock price

How to use JavaScript and WebSocket to implement a real-time online ordering system How to use JavaScript and WebSocket to implement a real-time online ordering system Dec 17, 2023 pm 12:09 PM

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 and WebSocket: Building an efficient real-time weather forecasting system JavaScript and WebSocket: Building an efficient real-time weather forecasting system Dec 17, 2023 pm 05:13 PM

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

PHP and JS Development Tips: Master the Method of Drawing Stock Candle Charts PHP and JS Development Tips: Master the Method of Drawing Stock Candle Charts Dec 18, 2023 pm 03:39 PM

With the rapid development of Internet finance, stock investment has become the choice of more and more people. In stock trading, candle charts are a commonly used technical analysis method. It can show the changing trend of stock prices and help investors make more accurate decisions. This article will introduce the development skills of PHP and JS, lead readers to understand how to draw stock candle charts, and provide specific code examples. 1. Understanding Stock Candle Charts Before introducing how to draw stock candle charts, we first need to understand what a candle chart is. Candlestick charts were developed by the Japanese

See all articles