页面回顶

web开发中经常有页面回顶的需求,近期使用,代码较简单,但是很实用!

html:

<a id="goTop" class="go-top" href="#header">
    <span class="go-top-inner">span>
a>

 

css:

.go-top {
    background: url("../img/xxx.png") no-repeat scroll left top transparent;
    bottom: 65px;
    color: #444444;
    display: none;
    height: 50px;
    margin-left: 510px;
    position: fixed;
    right: 160px;
    text-align: center;
    width: 50px;
}
.go-top:hover {
    background-position: -50px top;
}

图片:

 

js:

基于jquery


var gotop = $('#goTop');
gotop.click(function(){
  $("html,body").animate({scrollTop:0},200);
  return false;
});
$(window).scroll(function(){
    if(gotop.offset().top > window.innerHeight) 
    gotop.show();
   else 
    gotop.hide();
});

 

转载于:https://www.cnblogs.com/liliangel/p/5502015.html

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