Web Front-endJS TutorialHow to use simple js code to achieve the scrolling effect of the carousel?
The carousel display on the homepage is basically essential. So for novices, it may be a bit difficult to use original js. In fact, there is no need to think about image scrolling as complicated. The implementation principle of js carousel image can be mainly understood as merging images of the same size into a column, but only one of the images is displayed, and the rest are hidden. The displayed image is changed by modifying the left value. The carousel pictures automatically slide every few seconds to achieve the effect of pictures playing in turn. In terms of effects, there are sliding and gradual in. The sliding carousel is the effect of pictures sliding in from left to right, gradually in. A carousel image is the effect of images gradually displaying based on transparency.
So this article introduces how to use js to achieve image carousel and sliding effects. I hope it will be helpful to friends in need.
The specific code examples for js to implement carousel images are as follows:
//HTML代码部分
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js实现轮播图原理及示例</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<!--从左向右滑动-->
<nav>
<ul id="index">
<li class="on"></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
<ul id="img">
<li><img src="/static/imghwm/default1.png" data-src="img1.jpg" class="lazy" alt="img1"></li>
<li><img src="/static/imghwm/default1.png" data-src="img2.jpg" class="lazy" alt="img2"></li>
<li><img src="/static/imghwm/default1.png" data-src="img3.jpg" class="lazy" alt="img3"></li>
<li><img src="/static/imghwm/default1.png" data-src="img4.jpg" class="lazy" alt="img4"></li>
<li><img src="/static/imghwm/default1.png" data-src="img5.jpg" class="lazy" alt="img5"></li>
</ul>
</nav>
<script src="script.js"></script>
</body>
</html>//css代码部分
*{ margin:0; padding:0;
} nav{ width: 720px; height: 405px; margin:20px auto; overflow: hidden; position: relative;
} #index{ position: absolute; left:320px; bottom: 20px;
} #index li{ width:8px; height: 8px; border: solid 1px gray; border-radius: 100%; background-color: #eee; display: inline-block;
} #img{ width: 3600px;/*不给宽高无法移动*/
height: 405px; position: absolute;/*不定义absolute，js无法设置left和top*/
z-index: -1;
} #img li{ width: 720px; height: 405px; float: left;
} #index .on{ background-color: black;
}//js代码部分
function moveElement(ele,x_final,y_final,interval){//ele为元素对象
var x_pos=ele.offsetLeft; var y_pos=ele.offsetTop; var dist=0; if(ele.movement){//防止悬停
clearTimeout(ele.movement);
} if(x_pos==x_final&&y_pos==y_final){//先判断是否需要移动
return;
}
dist=Math.ceil(Math.abs(x_final-x_pos)/10);//分10次移动完成
x_pos = x_pos<x_final ? x_pos+dist : x_pos-dist;
dist=Math.ceil(Math.abs(y_final-y_pos)/10);//分10次移动完成
y_pos = y_pos<y_final ? y_pos+dist : y_pos-dist;
ele.style.left=x_pos+'px';
ele.style.top=y_pos+'px';
ele.movement=setTimeout(function(){//分10次移动，自调用10次
moveElement(ele,x_final,y_final,interval);
},interval)
}Note:
The image moving function moveElement() needs to obtain the image now position and the target position and calculate the difference between them to move. You can use offsetLeft and offsetTop to get the current position of the picture. The effect of "swiping across" the picture when moving is to divide the distance into 10 times for movement, that is, using the setTimeOut function. However, in order to prevent the mouse from hovering, the clearTimeout() function needs to be called.
[Recommended related articles]
Detailed examples of jquery to achieve the left and right carousel effect
CSS3 to achieve the carousel effect
Easily implement carousel images with JS
Two ways to implement carousel images with JS
The above is the detailed content of How to use simple js code to achieve the scrolling effect of the carousel?. For more information, please follow other related articles on the PHP Chinese website!
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
Python vs. JavaScript: Performance and Efficiency ConsiderationsApr 30, 2025 am 12:08 AMThe differences in performance and efficiency between Python and JavaScript are mainly reflected in: 1) As an interpreted language, Python runs slowly but has high development efficiency and is suitable for rapid prototype development; 2) JavaScript is limited to single thread in the browser, but multi-threading and asynchronous I/O can be used to improve performance in Node.js, and both have advantages in actual projects.
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
WebStorm Mac version
Useful JavaScript development tools
SublimeText3 English version
Recommended: Win version, supports code prompts!
Zend Studio 13.0.1
Powerful PHP integrated development environment
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
