Implementing fresh style image carousel effects based on javascript

Home

Web Front-end

JS Tutorial

Implementing fresh style image carousel effects based on javascript_javascript skills

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 16, 2016 pm 03:07 PM

jsImage Carousel

The example in this article shares with you the implementation of image carousel effects using JavaScript for your reference. The specific content is as follows

1. Realizing the effect

As shown above:

1. The pictures are automatically rotated in sequence. Each time a picture is rotated, the corresponding small icon below will have a red border and the corresponding picture name will be displayed

2. When the mouse is placed on the large picture, the picture stops rotating and the current picture is always displayed; after the mouse is moved away, the picture continues to rotate

3. When the mouse is moved over the small icon, the corresponding large image will be displayed in the large picture area; when the mouse is moved away, the rotation will continue from the current picture

2. Code

<!DOCTYPE html>
<html>
<head lang="en">
 <meta charset="UTF-8">
 <title>带小图标的JS图片轮换</title>
 <style type="text/css">
  *{
   margin: 0px;
   padding: 0px;
  }
  #content{
   width: 700px;
   height: 538px;
   margin: 0px auto; /*使所有内容居中*/
   border: solid #F0F0F0;
  }

  /*定义下面小图标处样式*/
  #nav1 table{
   width: 100%;
   height: 35px;
   margin-top: -4px;
  }
  #nav1 td{
   width: 35px;
   height: 35px;
   text-align: center; /*文字居中*/
   color: #ffffff;
  }
  #text{

  }
  #_text{
   width: 100%;
   height: 100%;
   background-color: #F0F0F0;
   border: none;
   text-align: center;
   font-size: 18px;
   color: #000000;
   font-weight: bold;
  }
 </style>
</head>
<body onload="changeImg()">
 <div id="content">
  <div id="images">
   <img  src="/static/imghwm/default1.png"  data-src="../images/textPhoto/1.jpg"  class="lazy"  id="_photoes" height="500px"    style="max-width:90%" onmouseover="over1()" onmouseout="out1()" alt="Implementing fresh style image carousel effects based on javascript_javascript skills" >
  </div>
  <div id="nav1">
   <table border="0">
    <tr>
     <td id="text" bgcolor="#F0F0F0" colspan="15"><input type="text" id="_text" readonly></td>
     <td id="img1" class="sImg" bgcolor="#db7093" onmouseover="over2(1)" onmouseout="out2(1)">1</td>
     <td id="img2" class="sImg" bgcolor="#da70d6" onmouseover="over2(2)" onmouseout="out2(2)">2</td>
     <td id="img3" class="sImg" bgcolor="#9acd32" onmouseover="over2(3)" onmouseout="out2(3)">3</td>
     <td id="img4" class="sImg" bgcolor="#adff2f" onmouseover="over2(4)" onmouseout="out2(4)">4</td>
     <td id="img5" class="sImg" bgcolor="#00bfff" onmouseover="over2(5)" onmouseout="out2(5)">5</td>
    </tr>
   </table>
  </div>
 </div>

 <script type="text/javascript">
  //将轮换的大图片放入数组中
  var arr = new Array();
  arr[0] = "../images/textPhoto/1.jpg";
  arr[1] = "../images/textPhoto/2.jpg";
  arr[2] = "../images/textPhoto/3.jpg";
  arr[3] = "../images/textPhoto/4.jpg";
  arr[4] = "../images/textPhoto/5.jpg";

  //将input区域变换的文字放在数组里
  var text = new Array();
  text[0] = "焦点图1";
  text[1] = "焦点图2";
  text[2] = "焦点图3";
  text[3] = "焦点图4";
  text[4] = "焦点图5";

  var smallImg = document.getElementsByClassName("sImg"); //将页面上所有小图片存放在一个数组

  var num = 0;
  function changeImg() {
   document.getElementById("_photoes").src = arr[num];
   document.getElementById("_text").value = text[num];
   //当前小图标增加边框样式
   for(var i=0;i<arr.length;i++) {
    if(i==num) smallImg[num].style.border = "red solid"; //大图标对应的小图标增加边框样式
    else smallImg[i].style.border = "none";
   }
   if (num == arr.length - 1) num = 0; //如果显示的是最后一张图片，则图片序号变为第一张的序号
   else num += 1; //图片序号加一
  }

  var setID = setInterval("changeImg()",1000); //这样写任然会不断调用changeImg()函数

  /*当鼠标滑到大图标上时*/
  function over1() {
   clearInterval(setID); //图片停止轮换
//   smallImg[n-1].style.border = "red solid";
  }

  /*当鼠标离开大图标时*/
  function out1() {
   setID = setInterval("changeImg()",1000);  //图片继续轮换
//   smallImg[n-1].style.border = "none"; //大图标对应的小图标边框样式取消
  }

  /*当鼠标滑到小图标上时*/
  function over2(n) {
   document.getElementById("_photoes").src = arr[n-1]; //只要鼠标滑到小图标上，大图区域就显示对应的图片
   document.getElementById("_text").value = text[n-1];
   clearInterval(setID); //图片停止轮换
   //当前小图标增加边框样式
   for(var i=0;i<arr.length;i++) {
    if(i==n-1) smallImg[n-1].style.border = "red solid";
    else smallImg[i].style.border = "none";
   }
  }

  /*当鼠标离开小图标时*/
  function out2(n) {
   if(n!=arr.length)
    num = n; //从当前图片开始轮换
   else num = 0;
   setID = setInterval("changeImg()",1000);  //图片继续轮换
//   smallImg[n-1].style.border = "none"; //小图标边框样式取消
  }
 </script>
</body>
</html>

3. Multiple image rotation debugging notes

js source code:

//实现几张图片的轮换
var num = 0;  //显示的图片序号，刚开始时是第一张图片
function changeImg1() {
  var arr = new Array();
  arr[0]="../images/hao123/7.jpg";
  arr[1]="../images/hao123/8.jpg";
  arr[2]="../images/hao123/9.jpg";
  var photo = document.getElementById("topPhoto");
  if (num == arr.length - 1) num = 0;  //如果显示的是最后一张图片，则图片序号变为第一张的序号
  else num += 1;  //图片序号加一
  photo.src = arr[num];
}
setInterval("changeImg1()",5000);  //每隔5000毫秒调用一次changImg1()函数

HTML code:

When using it, it is best to define the style of the picture and unify the length and width of the picture, so that the dynamic display effect of the picture will be better.

The above is the entire content of this article. I hope it will be helpful to everyone in learning javascript programming.

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

The Future of Python and JavaScript: Trends and PredictionsApr 27, 2025 am 12:21 AM

The future trends of Python and JavaScript include: 1. Python will consolidate its position in the fields of scientific computing and AI, 2. JavaScript will promote the development of web technology, 3. Cross-platform development will become a hot topic, and 4. Performance optimization will be the focus. Both will continue to expand application scenarios in their respective fields and make more breakthroughs in performance.

Python vs. JavaScript: Development Environments and ToolsApr 26, 2025 am 12:09 AM

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Is JavaScript Written in C? Examining the EvidenceApr 25, 2025 am 12:15 AM

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript's Role: Making the Web Interactive and DynamicApr 24, 2025 am 12:12 AM

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C and JavaScript: The Connection ExplainedApr 23, 2025 am 12:07 AM

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

From 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 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 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.

See all articles