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轮播图

文章目录

  • html
  • css部分
  • JavaScript部分
  • 易遗漏部分
  • 效果图

html

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body>
<div id="loop"><img src="0.jfif" id="pic" style="width: 100%;height: 100%"><ul id="list"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li></ul><div id="left" class="choose"><</div><div id="right" class="choose">></div>
</div>
<script type="text/javascript">var jsDiv=document.getElementById("loop");var jsImg=document.getElementById("pic");var jsLeft=document.getElementById("left");var jsRight=document.getElementById("right");var jsUL=document.getElementById("list");var jsLis=document.getElementsByTagName("li");jsLis[0].style.backgroundColor="red";var currentPage=0;var td=4000;var timer=setInterval(func,td);function func() {currentPage++;changePic();}function changePic() {if (currentPage===8)currentPage=0;if (currentPage===-1)currentPage=7;jsImg.src=currentPage+".jfif";for (var i = 0; i < jsLis.length; i++) {jsLis[i].style.backgroundColor="#aaa";}jsLis[currentPage].style.backgroundColor="red";}jsDiv.addEventListener("mouseover",func1,false);function func1() {clearInterval(timer);jsLeft.style.display="block";jsRight.style.display="block";}jsDiv.addEventListener("mouseout",func2,false);function func2(){timer=setInterval(func,td);jsLeft.style.display="none";jsRight.style.display="none";}jsLeft.addEventListener("click",func3,false);function func3() {currentPage--;changePic();}jsRight.addEventListener("click",func4,false);function func4() {currentPage++;changePic();}jsLeft.onmouseover=function () {this.style.backgroundColor="rgba(0,0,0,0.6)";}jsRight.onmouseover=function () {this.style.backgroundColor="rgba(0,0,0,0.6)";}jsLeft.onmouseout=function () {this.style.backgroundColor="rgba(0,0,0,0.2)";}jsRight.onmouseout=function () {this.style.backgroundColor="rgba(0,0,0,0.2)";}
</script>
</body>
</html>

css部分

<style type="text/css">#loop{width: 800px;height: 534px;margin: 0 auto;position: relative;}#list{list-style: none;position: absolute;bottom: 10px;left: 250px;}#list li{float: left;width: 20px;height: 20px;line-height: 20px;text-align: center;border-radius: 50%;background: #aaa;margin-right: 10px;cursor: pointer;}.choose{width: 50px;height: 100%;background-color: rgba(0,0,0,0.2);color: #fff;font-size: 30px;line-height: 534px;text-align: center;/*display: none;*/cursor: pointer;position: absolute;top: 0;}#left{left: 0;}#right{right: 0;}#pic{cursor: pointer;}
</style>

JavaScript部分

<script type="text/javascript">var jsDiv=document.getElementById("loop");var jsImg=document.getElementById("pic");var jsLeft=document.getElementById("left");var jsRight=document.getElementById("right");var jsUL=document.getElementById("list");var jsLis=document.getElementsByTagName("li");jsLis[0].style.backgroundColor="red";var currentPage=0;var td=4000;var timer=setInterval(func,td);function func() {currentPage++;changePic();}function changePic() {if (currentPage===8)currentPage=0;if (currentPage===-1)currentPage=7;jsImg.src=currentPage+".jfif";for (var i = 0; i < jsLis.length; i++) {jsLis[i].style.backgroundColor="#aaa";}jsLis[currentPage].style.backgroundColor="red";//修改指定li图标的颜色}jsDiv.addEventListener("mouseover",func1,false);function func1() {clearInterval(timer);jsLeft.style.display="block";jsRight.style.display="block";}jsDiv.addEventListener("mouseout",func2,false);function func2(){timer=setInterval(func,td);jsLeft.style.display="none";jsRight.style.display="none";}jsLeft.addEventListener("click",func3,false);function func3() {currentPage--;changePic();}jsRight.addEventListener("click",func4,false);function func4() {currentPage++;changePic();}jsLeft.onmouseover=function () {this.style.backgroundColor="rgba(0,0,0,0.6)";}jsRight.onmouseover=function () {this.style.backgroundColor="rgba(0,0,0,0.6)";}jsLeft.onmouseout=function () {this.style.backgroundColor="rgba(0,0,0,0.2)";}jsRight.onmouseout=function () {this.style.backgroundColor="rgba(0,0,0,0.2)";}
</script>

易遗漏部分

轮播图html部分只有一张图片的路径，因为图片的路径改变是通过js控制的。

图片的名字在这种情况下需要设置成纯数字，这样才能找到正确的图片路径，且图片的名字应该与currentPage的范围相照应。

效果图

本文标签： 轮播图

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