本篇文章给大家带来的内容是 JS 如何实现焦点图轮播效果?(代码示例). 有一定的参考价值, 有需要的朋友可以参考一下, 希望对大家有所帮助.
JS 实现焦点图轮播效果
效果图:
图片素材 :
(不过里面的图片路径需要自己改成自己的图片路径, 否则是没有图片显示的哦)
代码如下, 复制即可使用:
- <!DOCTYPE html>
- <HTML>
- <head>
- <meta charset="UTF-8">
- <title>
- JS 实现焦点图轮播效果
- </title>
- <style type="text/CSS">
- * { margin: 0; padding: 0; text-decoration: none; } body { padding: 20px;
- } #container { width: 600px; height: 400px; border: 3px solid #333; overflow:
- hidden; position: relative; } #list { width: 4200px; height: 400px; position:
- absolute; z-index: 1; } #list img { float: left; } #buttons { position:
- absolute; height: 10px; width: 100px; z-index: 2; bottom: 20px; left: 250px;
- } #buttons span { cursor: pointer; float: left; border: 1px solid #fff;
- width: 10px; height: 10px; border-radius: 50%; background: #333; margin-right:
- 5px; } #buttons .on { background: orangered; } .arrow { cursor: pointer;
- display: none; line-height: 39px; text-align: center; font-size: 36px;
- font-weight: bold; width: 40px; height: 40px; position: absolute; z-index:
- 2; top: 180px; background-color: RGBA(0, 0, 0, .3); color: #fff; } .arrow:hover
- { background-color: RGBA(0, 0, 0, .7); } #container:hover .arrow { display:
- block; } #prev { left: 20px; } #next { right: 20px; }
- </style>
- <script type="text/javascript">
- Windows.onload = function() {
- var container = document.getElementById('container');
- var list = document.getElementById('list');
- var buttons = document.getElementById('buttons').getElementsByTagName('span');
- var prev = document.getElementById('prev');
- var next = document.getElementById('next');
- var index = 1;
- var len = 5;
- var animated = false;
- var interval = 3000;
- var timer;
- function animate(offset) {
- if (offset == 0) {
- return;
- }
- animated = true;
- var time = 300;
- var inteval = 10;
- var speed = offset / (time / inteval);
- var left = parseInt(list.style.left) + offset;
- var go = function() {
- if ((speed > 0 && parseInt(list.style.left) < left) || (speed < 0 && parseInt(list.style.left) > left)) {
- list.style.left = parseInt(list.style.left) + speed + 'px';
- setTimeout(go, inteval);
- } else {
- list.style.left = left + 'px';
- if (left > -200) {
- list.style.left = -600 * len + 'px';
- }
- if (left < ( - 600 * len)) {
- list.style.left = '-600px';
- }
- animated = false;
- }
- }
- go();
- }
- function showButton() {
- for (var i = 0; i < buttons.length; i++) {
- if (buttons[i].className == 'on') {
- buttons[i].className = '';
- break;
- }
- }
- buttons[index - 1].className = 'on';
- }
- function play() {
- timer = setTimeout(function() {
- next.onclick();
- play();
- },
- interval);
- }
- function stop() {
- clearTimeout(timer);
- }
- next.onclick = function() {
- if (animated) {
- return;
- }
- if (index == 5) {
- index = 1;
- } else {
- index += 1;
- }
- animate( - 600);
- showButton();
- }
- prev.onclick = function() {
- if (animated) {
- return;
- }
- if (index == 1) {
- index = 5;
- } else {
- index -= 1;
- }
- animate(600);
- showButton();
- }
- for (var i = 0; i < buttons.length; i++) {
- buttons[i].onclick = function() {
- if (animated) {
- return;
- }
- if (this.className == 'on') {
- return;
- }
- var myIndex = parseInt(this.getAttribute('index'));
- var offset = -600 * (myIndex - index);
- animate(offset);
- index = myIndex;
- showButton();
- }
- }
- container.onmouseover = stop;
- container.onmouseout = play;
- play();
- }
- </script>
- </head>
- <body>
- <div id="container">
- <div id="list" style="left: -600px;">
- <!-- 放最后的一张图片 - 图片需要改为自己的图片路径 -->
- <img src="img/5.jpg" alt="1" />
- <img src="img/1.jpg" alt="1" />
- <img src="img/2.jpg" alt="2" />
- <img src="img/3.jpg" alt="3" />
- <img src="img/4.jpg" alt="4" />
- <img src="img/5.jpg" alt="5" />
- <!-- 放第一张的图片 -->
- <img src="img/1.jpg" alt="5" />
- </div>
- <div id="buttons">
- <span index="1" class="on">
- </span>
- <span index="2">
- </span>
- <span index="3">
- </span>
- <span index="4">
- </span>
- <span index="5">
- </span>
- </div>
- <a href="javascript:;" id="prev" class="arrow">
- <</a>
- <a href="javascript:;" id="next" class="arrow">
- >
- </a>
- </div>
- </body>
- </HTML>
如有错误, 欢迎联系我改正, 非常感谢!!!
更多 web 前端 https://www.html.cn/ 知识, 请查阅 HTML 中文网 !!
来源: http://www.css88.com/web/javascript/17466.html