返回顶部模仿天猫的返回顶部代码 HTML JQuery CSS JavaScript

来源：互联网发布：mac 液体唇膏试色编辑：程序博客网时间：2024/05/16 05:58

关于返回顶部这个功能，绝大部分网站都有用到，算是一个细节方面的小东西，个人觉得天猫的返回顶部这个小东西做的挺好，下面便是我模仿它的代码：

HTML：

</!DOCTYPE html><html><head><title>返回顶部,模仿某猫</title><link rel="stylesheet" type="text/css" href="css.css"></head><body id="page"><h1>返回顶部</h1><h2>返回顶部</h2><h3>返回顶部</h3><h4>返回顶部</h4><h5>返回顶部</h5><h1>返回顶部</h1><h2>返回顶部</h2><h3>返回顶部</h3><h4>返回顶部</h4><h5>返回顶部</h5><h1>返回顶部</h1><h2>返回顶部</h2><h3>返回顶部</h3><h4>返回顶部</h4><h5>返回顶部</h5><h1>返回顶部</h1><h2>返回顶部</h2><h3>返回顶部</h3><h4>返回顶部</h4><h5>返回顶部</h5><h1>返回顶部</h1><h2>返回顶部</h2><h3>返回顶部</h3><h4>返回顶部</h4><h5>返回顶部</h5><script type="text/javascript" src="jquery.min.js"></script><script type="text/javascript" src="script.js"></script></body></html>

CSS：

#gotoTop {box-sizing: border-box;display: none;position: fixed;bottom: 10%;right: 20px;cursor: pointer;padding: 9px 2px;width: 40px;height: 40px; text-align : center;border: 1px solid #e0e0e0;z-index: 99;background: #000url("data:image/png;base64,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");background-size: 100% auto;text-align: center;}#gotoTop {_position: absolute;_top: expression(documentElement.scrollTop + documentElement.clientHeight * 3/4 + "px")}#gotoTop.hover {background: #165ec5url("data:image/png;base64,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");text-decoration: none;background-size: 100% auto;}.fay-tip:hover p{display:block;transform-origin: 100% 0%;-webkit-animation: topFadeIn 0.4s ease-in-out;animation: topFadeIn 0.4s ease-in-out;}.fay-tip p{display:none;background-color: #494949;padding: 10px;width: 80px;position: absolute;box-shadow: 1px 1px 1px rgba(0, 0, 0, 0.2);right: 38px;color: #FFF;font-size: 13px;line-height: 1.4;top:0;margin: 0 0 10px;}.fay-tip p:before{position: absolute;content: '';width:0;height: 0;border:6px solid transparent;border-bottom-color:#494949;right:-12px;top:10px;border-color: transparent transparent transparent #494949;}.fay-tip p:after{width:100%;height:40px;content:'';position: absolute;top:0;left:80px;}@-webkit-keyframes topFadeIn {0% { right:80px;opacity:0; transform: scale(0.6);}100% {right:38px;opacity:100%;transform: scale(1);}}@keyframes topFadeIn {0% {right:80px;opacity:0; }100% {right:38px;opacity:100%; }}

JS：

gotoTop();function gotoTop(min_height) {// 预定义返回顶部的html代码，它的css样式默认为不显示var gotoTop_html = '<div id="gotoTop" class="fay-tip"><p>返回顶部</p></div>';// 将返回顶部的html代码插入页面上id为page的元素的末尾$("#page").append(gotoTop_html);$("#gotoTop").click(// 定义返回顶部点击向上滚动的动画function() {$('html,body').animate({scrollTop : 0}, 700);}).hover(// 为返回顶部增加鼠标进入的反馈效果，用添加删除css类实现function() {$(this).addClass("hover");}, function() {$(this).removeClass("hover");});// 获取页面的最小高度，无传入值则默认为600像素min_height ? min_height = min_height : min_height = 0;// 为窗口的scroll事件绑定处理函数$(window).scroll(function() {// 获取窗口的滚动条的垂直位置var s = $(window).scrollTop();// 当窗口的滚动条的垂直位置大于页面的最小高度时，让返回顶部元素渐现，否则渐隐if (s > min_height) {$("#gotoTop").fadeIn(100);} else {$("#gotoTop").fadeOut(200);}});}

至于jQuery就不用介绍了，基本上大家都了解，希望帮助那些纠结于实现返回顶部的朋友们。

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返回顶部 模仿天猫的返回顶部代码 HTML JQuery CSS JavaScript

返回顶部模仿天猫的返回顶部代码 HTML JQuery CSS JavaScript