search
HomeWeb Front-endJS TutorialCustom scroll bars: separate implementation steps for html, css, and js code

HTML structure

<p class="content" id="content">
		<p class="con-scroll" id="countent">
			js对于鼠标滚轮事件的监听
			<br>
			2017年08月25日 18:17:56
			<br>
			阅读数:10072
			<br>
			需求:
			<br>

			通过鼠标滚轮实现某个表单内的数字增加减少操作,或者滚轮控制某个按钮的上下滚动后触发不同的事件。

			<br>
			实现:
			<br>

			通过js对鼠标滚轮的事件进行监听。
			<br>

			描述:
			<br>

			首先,不同的浏览器有不同的滚轮事件。主要是有两种,onmousewheel(firefox不支持)和DOMMouseScroll(只有firefox支持),关于这两个事件这里不做详述,想要了解的朋友请移步:鼠标滚轮(mousewheel)和DOMMouseScroll事件。
			<br>
			具体实现:1. 需要添加事件监听,代码如下:兼容firefox采用addEventListener监听
			<br>



			 /*监听鼠标滚动事件
			 <br>
			         * 1.火狐的是:DOMMouseScroll;
			         <br>
			         * 2.IE/Opera/Chrome:直接添加事件*/
			         <br>
			        if(document.addEventListener){
			        <br>
			            document.addEventListener(&#39;DOMMouseScroll&#39;,scrollFunc,false);
			            <br>
			        }//W3C
			        <br>
			        window.onmousewheel=document.onmousewheel=scrollFunc;//IE/Opera/Chrome
			        <br>

			var scrollFunc=function(e){
			<br>
			            e=e || window.event;
			            <br>
			            if(e.wheelDelta){//IE/Opera/Chrome
			            <br>
			            	//自定义事件:编写具体的实现逻辑
			            	<br>
			                mouseScroll();
			                <br>
			            }else if(e.detail){//Firefox
			            <br>
			            	//自定义事件:编写具体的实现逻辑
			            	<br>
			                mouseScroll();
			                <br>
			            }
			            <br>
			        }
			        <br>

			简要说明:
			<br>
			判断滚轮向上或向下在浏览器中也要考虑兼容性,现在五大浏览器(IE、Opera、Safari、Firefox、Chrome)中Firefox 使用detail,其余四类使用wheelDelta;两者只在取值上不一致,代表含义一致,detail与wheelDelta只各取两个 值,detail只取±3,wheelDelta只取±150,其中正数表示为向下,负数表示向上
			<br>

			版权声明:本文为博主原创文章,未经博主允许不得转载。	https://blog.csdn.net/qq_35647781/article/details/77584977
			<br>
		</p>
		<p class="scroll-wrap" id="wrapScroll">
			<span></span>
		</p>
	</p>

css structure

    .content{
			width: 500px;
			height: 400px;
			border:1px solid;
			overflow: hidden;
			padding:40px;
			margin:50px auto;
			position: relative;
		}
		.scroll-wrap{
			position: absolute;
			width: 10px;
			height: 100%;
			background: #d8d4d4;
			top:0;
			right:0;
		}
		.scroll-wrap span{
			display: block;
			width: 5px;
			height: 100px;
			background: red;
			border-radius: 10px;
			margin:0 auto;
			position: relative;
		}

js code

<script>
		var wrapScroll=document.getElementById("wrapScroll")
		var tapScroll=wrapScroll.getElementsByTagName("span")[0];
		var contentIn=document.getElementById("countent");
		var content=document.getElementById("content")
		tapScroll.onmousedown=function(){
			var e=e||window.event;
			var dowY=e.pageY-this.offsetTop;
			document.onmousemove=function(e){
				var ev=e||window.event;
				var movY=ev.pageY-dowY;
				conmon(movY)
			}
			document.onmouseup=function(){
				document.onmousemove=null;
			}
		}

		content.onmousewheel=function(event){
			var stemp=tapScroll.offsetTop-content.offsetTop+50;
			conmon(stemp)
		}
		function conmon(num){
			var dela=wheel(event)
			num=num<0?0:num;
			var c=wrapScroll.offsetHeight-tapScroll.offsetHeight 	
			dela>0?num-=10:num+=10;			
			num=num>c?c:num
			tapScroll.style.top=num+"px";
			var speed=(contentIn.offsetHeight-content.offsetHeight)/c+0.2;
			console.log(speed)
			contentIn.style.marginTop=-(speed*num)+"px"
		}
		//滚轮事件封装
		function wheel(event){
			var e=event||window.event;
			var delta=0;//次数
			if(e.wheelDelta){
				delta=e.wheelDelta/120;
			}else if(e.detail){
				delta=e.detail/3;
			}
			if(e.preventDefault){
				e.preventDefault()
			}
			return delta
		}
	</script>

Related recommendations:

Detailed example of CSS3 custom scroll bar style

Detailed explanation of css3 custom scroll bar style Writing method

The above is the detailed content of Custom scroll bars: separate implementation steps for html, css, and js code. For more information, please follow other related articles on the PHP Chinese website!

Statement
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
From Websites to Apps: The Diverse Applications of JavaScriptFrom Websites to Apps: The Diverse Applications of JavaScriptApr 22, 2025 am 12:02 AM

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python vs. JavaScript: Use Cases and Applications ComparedPython vs. JavaScript: Use Cases and Applications ComparedApr 21, 2025 am 12:01 AM

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

The Role of C/C   in JavaScript Interpreters and CompilersThe Role of C/C in JavaScript Interpreters and CompilersApr 20, 2025 am 12:01 AM

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

JavaScript in Action: Real-World Examples and ProjectsJavaScript in Action: Real-World Examples and ProjectsApr 19, 2025 am 12:13 AM

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.

JavaScript and the Web: Core Functionality and Use CasesJavaScript and the Web: Core Functionality and Use CasesApr 18, 2025 am 12:19 AM

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

Understanding the JavaScript Engine: Implementation DetailsUnderstanding the JavaScript Engine: Implementation DetailsApr 17, 2025 am 12:05 AM

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python vs. JavaScript: The Learning Curve and Ease of UsePython vs. JavaScript: The Learning Curve and Ease of UseApr 16, 2025 am 12:12 AM

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python vs. JavaScript: Community, Libraries, and ResourcesPython vs. JavaScript: Community, Libraries, and ResourcesApr 15, 2025 am 12:16 AM

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

See all articles

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

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

MantisBT

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.

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool