Web Front-endJS TutorialUse native JS to encapsulate Tap events to solve the 300ms delay on the mobile terminalUse native JS to encapsulate Tap events to solve the 300ms delay on the mobile terminal
FastClick
There is now a ready-made plug-in fastclick that can solve this problem, but it also has disadvantages:
The latest version of the plug-in on GitHub is 25.4kb in size. Lightweight is the trend, so save what you can.
Its core idea is to cancel the default click time, determine the type of the current DOM node, and perform corresponding operations. This judgment process is relatively cumbersome.
MyTapEvent
I have recently been working on a WeChat project. Due to certain drawbacks of the fastclick plug-in, I developed a simple tap event. The main ideas are as follows:
Thinking
A tap event includes touchstart and touchmove (slight movement) ) and the three states of touchend
The callback method is executed after touchend
According to the default judgment of the Chrome browser, the movement amount of the click is canceled. If the finger offset (horizontal or vertical) exceeds 15px, it is judged as scrolling and the tap event is canceled
If your finger is pressed for too long, it will not be regarded as a click. The default time interval is 500ms
Use HTMLElement to expand the prototype to easily add Events
Use singleton mode to ensure that it is only loaded once
ok, settle down and start writing the code It’s much clearer:
if (!HTMLElement.prototype.addTapEvent) {
HTMLElement.prototype.addTapEvent = function(callback) { var tapStartTime = 0,
tapEndTime = 0,
tapTime = 500, //tap等待时间，在此事件下松开可触发方法
tapStartClientX = 0,
tapStartClientY = 0,
tapEndClientX = 0,
tapEndClientY = 0,
tapScollHeight = 15, //水平或垂直方向移动超过15px测判定为取消（根据chrome浏览器默认的判断取消点击的移动量)
cancleClick = false; this.addEventListener('touchstart', function() {
tapStartTime = event.timeStamp; var touch = event.changedTouches[0];
tapStartClientX = touch.clientX;
tapStartClientY = touch.clientY;
cancleClick = false;
}) this.addEventListener('touchmove', function() { var touch = event.changedTouches[0];
tapEndClientX = touch.clientX;
tapEndClientY = touch.clientY; if ((Math.abs(tapEndClientX - tapStartClientX) > tapScollHeight) || (Math.abs(tapEndClientY - tapStartClientY) > tapScollHeight)) {
cancleClick = true;
}
}) this.addEventListener('touchend', function() {
tapEndTime = event.timeStamp; if (!cancleClick && (tapEndTime - tapStartTime) <= tapTime) {
callback();
}
})
}
}Usage
HTMLElement.addTapEvent(function(){ //do something...})
如：document.querySelect('#test').addTapEvent(function(){
alert('this is a tap event');
})Case
Here is a mobile case, which also includes the knowledge of closures. The first 20 items are tap events, and the last 30 items are click events. You can use it on your mobile phone Try the effect and feel the difference between the two methods:
<style media="screen">
li { padding: 20px;
}</style><!DOCTYPE html><html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-touch-fullscreen" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="format-detection" content="telephone=no,email=no">
<meta name="x5-orientation" content="portrait">
<title>test</title>
</head>
<body>
<ul></ul>
</body>
<script type="text/javascript">
if (!HTMLElement.prototype.addTapEvent) {
HTMLElement.prototype.addTapEvent = function(callback) { var tapStartTime = 0,
tapEndTime = 0,
tapTime = 500, //tap等待时间，在此事件下松开可触发方法
tapStartClientX = 0,
tapStartClientY = 0,
tapEndClientX = 0,
tapEndClientY = 0,
tapScollHeight = 15, //水平或垂直方向移动超过15px测判定为取消（根据chrome浏览器默认的判断取消点击的移动量)
cancleClick = false; this.addEventListener('touchstart', function() {
tapStartTime = event.timeStamp; var touch = event.changedTouches[0];
tapStartClientX = touch.clientX;
tapStartClientY = touch.clientY;
cancleClick = false;
}) this.addEventListener('touchmove', function() { var touch = event.changedTouches[0];
tapEndClientX = touch.clientX;
tapEndClientY = touch.clientY; if ((Math.abs(tapEndClientX - tapStartClientX) > tapScollHeight) || (Math.abs(tapEndClientY - tapStartClientY) > tapScollHeight)) {
cancleClick = true;
}
}) this.addEventListener('touchend', function() {
tapEndTime = event.timeStamp; if (!cancleClick && (tapEndTime - tapStartTime) <= tapTime) {
callback();
}
})
}
} var ul = document.querySelector('ul'); for (var i = 1; i <= 20; i++) { var li = document.createElement('li');
li.innerHTML = i;
li.addTapEvent(function() { var x = i; return function() {
alert(x);
}
}())
ul.appendChild(li);
} for (var j = 21; j <= 50; j++) { var li = document.createElement('li');
li.innerHTML = j;
li.onclick = function() { var x = j; return function() {
alert(x);
}
}()
ul.appendChild(li);
} </script></html>
Python vs. JavaScript: Choosing the Right Tool for the JobMay 08, 2025 am 12:10 AMWhether to choose Python or JavaScript depends on the project type: 1) Choose Python for data science and automation tasks; 2) Choose JavaScript for front-end and full-stack development. Python is favored for its powerful library in data processing and automation, while JavaScript is indispensable for its advantages in web interaction and full-stack development.
Python and JavaScript: Understanding the Strengths of EachMay 06, 2025 am 12:15 AMPython and JavaScript each have their own advantages, and the choice depends on project needs and personal preferences. 1. Python is easy to learn, with concise syntax, suitable for data science and back-end development, but has a slow execution speed. 2. JavaScript is everywhere in front-end development and has strong asynchronous programming capabilities. Node.js makes it suitable for full-stack development, but the syntax may be complex and error-prone.
JavaScript's Core: Is It Built on C or C ?May 05, 2025 am 12:07 AMJavaScriptisnotbuiltonCorC ;it'saninterpretedlanguagethatrunsonenginesoftenwritteninC .1)JavaScriptwasdesignedasalightweight,interpretedlanguageforwebbrowsers.2)EnginesevolvedfromsimpleinterpreterstoJITcompilers,typicallyinC ,improvingperformance.
JavaScript Applications: From Front-End to Back-EndMay 04, 2025 am 12:12 AMJavaScript can be used for front-end and back-end development. The front-end enhances the user experience through DOM operations, and the back-end handles server tasks through Node.js. 1. Front-end example: Change the content of the web page text. 2. Backend example: Create a Node.js server.
Python vs. JavaScript: Which Language Should You Learn?May 03, 2025 am 12:10 AMChoosing Python or JavaScript should be based on career development, learning curve and ecosystem: 1) Career development: Python is suitable for data science and back-end development, while JavaScript is suitable for front-end and full-stack development. 2) Learning curve: Python syntax is concise and suitable for beginners; JavaScript syntax is flexible. 3) Ecosystem: Python has rich scientific computing libraries, and JavaScript has a powerful front-end framework.
JavaScript Frameworks: Powering Modern Web DevelopmentMay 02, 2025 am 12:04 AMThe power of the JavaScript framework lies in simplifying development, improving user experience and application performance. When choosing a framework, consider: 1. Project size and complexity, 2. Team experience, 3. Ecosystem and community support.
The Relationship Between JavaScript, C , and BrowsersMay 01, 2025 am 12:06 AMIntroduction I know you may find it strange, what exactly does JavaScript, C and browser have to do? They seem to be unrelated, but in fact, they play a very important role in modern web development. Today we will discuss the close connection between these three. Through this article, you will learn how JavaScript runs in the browser, the role of C in the browser engine, and how they work together to drive rendering and interaction of web pages. We all know the relationship between JavaScript and browser. JavaScript is the core language of front-end development. It runs directly in the browser, making web pages vivid and interesting. Have you ever wondered why JavaScr
Node.js Streams with TypeScriptApr 30, 2025 am 08:22 AMNode.js excels at efficient I/O, largely thanks to streams. Streams process data incrementally, avoiding memory overload—ideal for large files, network tasks, and real-time applications. Combining streams with TypeScript's type safety creates a powe
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
SublimeText3 Linux new version
SublimeText3 Linux latest version
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
Notepad++7.3.1
Easy-to-use and free code editor
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
