Javascript implements disabling mouse wheel events_javascript skills
We usually adjust the compatibility of lower versions of IE when it comes to compatible things, but this time it’s not because the lower version of the browser is incompetent. It's because Firefox has gone too far and completely disregards the experience of other browsers. All browsers except Firefox can use the MouseWheel event to handle the response of the mouse wheel. However, Firefox does not support MouseWheel, and uses the nonsensical DOMMouseScroll, which is not compatible with other browsers except Firefox. In other words, for handling mouse wheel events, Firefox can only use DOMMouseScroll. Non-Firefox can only use MouseWheel. The principles of these two events are different, and the data they process is also different.
var firefox = navigator.userAgent.indexOf('Firefox') != -1;
firefox ? img.addEventListener('DOMMouseScroll', MouseWheel, false) :
(img.onmousewheel = MouseWheel);
function MouseWheel(e) {
e = e || window.event;
if (e.stopPropagation) e.stopPropagation();
else e.cancelBubble = true;
if (e.preventDefault) e.preventDefault();
else e.returnValue = false;
}
Let’s take a look at the complete code
<!DOCTYPE html>
<style>
span {font:14px/20px 微软雅黑;}
#counter {
width:50px;height:20px;
border:1px solid #CCC;
background:#F9F9F9;
font:14px/20px Consolas;
text-align:center;
margin:10px;
}
</style>
<span>使用鼠标滚轮调整数值大小</span><br/>
<div id="counter">0</div>
<script>
//判断浏览器
var isIE=navigator.userAgent.match(/MSIE (\d)/i);
isIE=isIE?isIE[1]:undefined;
var isFF=/FireFox/i.test(navigator.userAgent);
//获取元素
var counter=document.getElementById("counter");
//鼠标滚轮事件
if(isIE<9) //传统浏览器使用MouseWheel事件
counter.attachEvent("onmousewheel",function(){
//计算鼠标滚轮滚动的距离
//一格3行，每行40像素，所以除以120
var v=event.wheelDelta/120;
counter.innerHTML=counter.innerHTML*1+v;
//阻止浏览器默认方法
return false;
});
else if(!isFF) //除火狐外的现代浏览器也使用MouseWheel事件
counter.addEventListener("mousewheel",function(e){
//计算鼠标滚轮滚动的距离
var v=e.wheelDelta/120;
counter.innerHTML=counter.innerHTML*1+v;
//阻止浏览器默认方法
e.preventDefault();
},false);
else //奇葩的火狐使用DOMMouseScroll事件
counter.addEventListener("DOMMouseScroll",function(e){
//计算鼠标滚轮滚动的距离
//一格是3行，但是要注意，这里和像素不同的是它是负值
var v=-e.detail/3;
counter.innerHTML=counter.innerHTML*1+v;
//阻止浏览器默认方法
e.preventDefault();
},false);
</script>The above is the entire content of this article, I hope you all like it.
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
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
1664
14
1423
52
1317
25
1268
29
1243
24
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.
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
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
How to implement an online reservation system using WebSocket and JavaScript
Dec 17, 2023 am 09:39 AM
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.
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
Simple JavaScript Tutorial: How to Get HTTP Status Code
Jan 05, 2024 pm 06:08 PM
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
How to use insertBefore in javascript
Nov 24, 2023 am 11:56 AM
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).
JavaScript and WebSocket: Building an efficient real-time image processing system
Dec 17, 2023 am 08:41 AM
JavaScript is a programming language widely used in web development, while WebSocket is a network protocol used for real-time communication. Combining the powerful functions of the two, we can create an efficient real-time image processing system. This article will introduce how to implement this system using JavaScript and WebSocket, and provide specific code examples. First, we need to clarify the requirements and goals of the real-time image processing system. Suppose we have a camera device that can collect real-time image data
