本文实例为大家分享了js实现京东轮播图效果的具体代码，供大家参考，具体内容如下
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>title</title> <style> body,ul,li{padding:0;margin:0;} li{list-style-type:none;} .wrap{ position:relative; width:480px; height:260px; margin:100px auto; } .wrap>ul>li{position:absolute;display:none;} /*隐藏所有的li*/ .wrap img{width:480px;height:260px;} .wrap li:first-child{display:block;}/*显示第一个*/ .arrow{ width:480px; height:60px; position:absolute; top:50%; margin-top:-30px; display:none; } .arrow>span{ font-size:24pt; line-height:60px; display:inline-block; width:36px; background-color:#cee5e8; text-align:center; cursor:pointer; opacity:0.5; border-radius:5px;/*显示圆框*/ -webkit-border-radius:5px; -moz-border-radius:5px; color:black; } .wrap:hover .arrow{ display:block; } .arrow>span:last-child{ float:right; } </style> </head> <body> <p class="wrap"> <!--图片部分--> <ul> <li> <a href="javascript:void(0)"> <img src="images/1.jpg"/> </a> </li> <li> <a href="javascript:void(0)"> <img src="images/2.jpg"/> </a> </li> <li> <a href="javascript:void(0)"> <img src="images/3.jpg"/> </a> </li> <li> <a href="javascript:void(0)"> <img src="images/4.jpg"/> </a> </li> </ul> <!--按钮部分--> <p class="arrow"> <span><</span> <span>></span> </p> </p> </body> <script src="jquery-1.12.0.min.js"></script> <script> $(function(){ var count = 0; function change() { count++; if( count == $(".wrap>ul>li").length){ count = 0; } $(".wrap>ul>li").eq(count).fadein().siblings("li").fadeout(); } var mytimer = setinterval(change,4000); function rerun(){ mytimer = setinterval(change,4000); } /*注意jquery中setinterval函数不要加引号和(),否则会报缺少对象*/ $(".arrow>span").eq(0).click(function(){ clearinterval(mytimer); /*清除计时器，目的在于不会因点击按钮时setinterval事件仍旧执行*/ count--; if( count == -1){ count = $(".wrap>ul>li").length - 1; } $(".wrap>ul>li").eq(count).fadein().siblings("li").fadeout(); settimeout(rerun,0); /*重新启动计时器，保证不点击按钮是能正常切换*/ }); $(".arrow>span").eq(1).click(function(){ clearinterval(mytimer); count++; if( count == $(".wrap>ul>li").length){ count = 0; } $(".wrap>ul>li").eq(count).fadein().siblings("li").fadeout(); settimeout(rerun,0); }); }); </script> </html>
以上就是js是如何实现京东轮播图效果的？的详细内容。