jquery实现点击回到顶部
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>回到顶部</title> <meta name="viewport" content="width=1200, maximum-scale=1.0, user-scalable=1"> <style> .scrollToTop{ display: block; width: 42px; height: 42px; position: fixed; bottom: 5%; right: 2%; display: none; font-size: 40px; background: #232323; color: #ebebeb; border-radius: 3px; text-align: center; line-height: 38px; z-index: 999; } .scrollToTop i img{margin:9px 0px 0px 2px;} </style> </head> <body style="height:2000px"> <a href="#" title="sroll" class="scrollToTop"><i><img src="https://www.cnblogs.com/images/cnblogs_com/wrongcode/1426773/o_uptop0.png" alt=""></i></a> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <script type="text/javascript"> $(window).scroll(function() { if ($(this).scrollTop() > 300) { $('.scrollToTop').fadeIn(); } else { $('.scrollToTop').fadeOut(); } }); $('.scrollToTop').on("click", function() { $('html, body').animate({ scrollTop: 0 }, 800); return false; }); </script> </body> </html>