JS achieves banner image carousel effect (mouse event ),

Last Update:2017-08-12 Source: Internet

Author: User

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1. effects to be achieved

1. switch between the left and right clicks

2. Click the dot to switch the image

II.

Iii. Code

1. css

<style type="text/css">body,img,span,ul,li{margin: 0;padding: 0;}#div1{width: 600px;height: 350px;margin: 150px auto;border: 10px solid #eee;position: relative;}img{width: 600px;height: 350px;}span{display: inline-block;position: absolute;width: 50px;height: 50px;border-radius: 25px;background:rgba(0,0,0,.3); font-size: 30px;line-height: 50px;text-align: center;cursor: pointer;color: white;}span:hover{background:rgba(255,255,255,.5);color:black;transform:scale(1.3);}span#L{left: 10px;top: 150px;}span#R{right: 10px;top: 150px;}#div1 #ul{position: absolute;bottom: 10px;left: 250px;width: 125px;height: 20px;}#div1 #ul li{list-style: none;float: left;height: 20px;width: 20px;border-radius: 10px;background:rgba(255,255,255,.5); margin-right: 5px;cursor: pointer;}#div1 #ul .active{background:rgba(0,0,0,.5);}</style>

2. html

<body>  <div id="div1">        <span id="L"><</span>    <span id="R">></span>    <ul id="ul">     <li></li>     <li></li>     <li></li>     <li></li>     <li></li>    </ul>  </div></body>

3. js

<Script type = "text/javascript"> window. onload = function () {var div1 = document. getElementById ('div1 '); var oImg = div1.getElementsByTagName ('img') [0]; var spanL = document. getElementById ('l'); var spanR = document. getElementById ('R'); var oUl = document. getElementById ('ul '); var oLi = oUl. getElementsByTagName ('lil'); var arrImg = ['img2/1.jpg ', 'img2/2.jpg', 'img2/3.jpg ', 'img2/4.jpg ', 'img2/5.jpg ']; var num = 0; var oldLi = 0; function fn (num) {oImg. src = arrImg [num];} fn (0); function fnLi (num) {oLi [oldLi]. className = ''; oLi [num]. className = 'active'; oldLi = num;} fnLi (0);/* switch between left and right span images * // * switch between li and spanL when left and right spans are clicked */spanL. onclick = function () {if (num <1) {num = arrImg. length-1; fn (num); fnLi (num);} else {num --; fnLi (num); fn (num) ;}} spanR. onclick = function () {if (num = arrImg. length-1) {num = 0; fn (num); fnLi (num) ;}else {num ++; fnLi (num); fn (num );}} /* click li to implement image switching */for (var I = 0; I <oLi. length; I ++) {oLi [I]. index = I; oLi [I]. onclick = function () {fn (this. index); fnLi (this. index) ;}}</script>

Summary

The above is a small series of JS implementation banner image carousel effect (mouse event), I hope to help you, if you have any questions, please leave a message, the editor will reply to you in a timely manner. Thank you very much for your support for the help House website!

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JS achieves banner image carousel effect (mouse event ),

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