Detailed explanation of the implementation principle of js image carousel effect

Home

Web Front-end

JS Tutorial

Detailed explanation of the implementation principle of js image carousel effect_javascript skills

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 16, 2016 pm 03:25 PM

jsImage Carousel

The example in this article describes the implementation principle of js image carousel effect, and shares it with everyone for your reference. The specific content is as follows

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 
<html>
 
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<script type="text/javascript">
 var timeID;
 var image;
 var current = 0;
 var images = new Array(5);
 function init(){
 for (var i=1;i<=5;i++){
 images[i] = new Image(450,550);
 images[i].src = "pictures/"+i+".jpg";
 }
 image = document.images[0];
 }
 function setSrc(i){
 current = i;
 //设置图片src的属性，实现图片的切换
 image.src = images[i].src;
 }
 function pre(){
 if (current <= 0){
 alert('已经是第一张了');
 }else{
 current--;
 setSrc(current);
 }
 }
 function next(){
 if (current >= 5){
 alert('已经是最后一张了');
 }else{
 current++;
 setSrc(current);
 }
 }
 function play(){
 if (current >= 5){
 current = 0;
 }
 setSrc(++current);
 }
</script>
<body onload="init()">
<input type="button" value="第一张" onclick="setSrc(1)">
<input type="button" value="上一张" onclick="pre()">
<input type="button" value="下一张" onclick="next()">
<input type="button" value="最后一张" onclick="setSrc(5)">
<input type="button" value="幻灯播放" onclick="timeID=setInterval('play()',500)">
<input type="button" value="停止播放" onclick="clearInterval(timeID)">
<div style="border:1px solid blue;width:450px; height:550px;" id="myPic">
 <img  src="/static/imghwm/default1.png"  data-src="pictures/1.jpg"  class="lazy" / alt="Detailed explanation of the implementation principle of js image carousel effect_javascript skills" >
</div>
</body>
</html>

Here’s the principle

First, the init() function is used to initialize the images array and the value of the image. In this example, setSrc() is mainly used to set the src attribute value of the image, thus achieving image switching. The image carousel uses a timer. It shows when it comes! setInterval('play()',500) means calling the play() function every 0.5s!

The above is the js image carousel effect code, and a brief introduction to the principle of realizing the js image carousel effect. I hope it can help everyone to truly apply what they have learned.

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

Building a Multi-Tenant SaaS Application with Next.js (Backend Integration)Apr 11, 2025 am 08:23 AM

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

How to Build a Multi-Tenant SaaS Application with Next.js (Frontend Integration)Apr 11, 2025 am 08:22 AM

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base

JavaScript: Exploring the Versatility of a Web LanguageApr 11, 2025 am 12:01 AM

JavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.

The Evolution of JavaScript: Current Trends and Future ProspectsApr 10, 2025 am 09:33 AM

The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.

Demystifying JavaScript: What It Does and Why It MattersApr 09, 2025 am 12:07 AM

JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

Is Python or JavaScript better?Apr 06, 2025 am 12:14 AM

Python is more suitable for data science and machine learning, while JavaScript is more suitable for front-end and full-stack development. 1. Python is known for its concise syntax and rich library ecosystem, and is suitable for data analysis and web development. 2. JavaScript is the core of front-end development. Node.js supports server-side programming and is suitable for full-stack development.

How do I install JavaScript?Apr 05, 2025 am 12:16 AM

JavaScript does not require installation because it is already built into modern browsers. You just need a text editor and a browser to get started. 1) In the browser environment, run it by embedding the HTML file through tags. 2) In the Node.js environment, after downloading and installing Node.js, run the JavaScript file through the command line.

How to send notifications before a task starts in Quartz?Apr 04, 2025 pm 09:24 PM

How to send task notifications in Quartz In advance When using the Quartz timer to schedule a task, the execution time of the task is set by the cron expression. Now...

See all articles