元素滑出之前 和之后的位置是不一样的
滑出之前 opacity: 0; 之后为 1
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
*{
margin:0;
padding:0;
}
.test{
margin:900px auto 500px;
width:800px;
height:600px;
position: relative;
background-color: #00ac61;
}
.animate-box{
position: absolute;
left:200px;
width:400px;
height:300px;
opacity: 0;
background-color: palevioletred;
}
</style>
<script src="./js/jquery-1.11.3.min.js"></script>
</head>
<body>
<div class="test">
<div class="animate-box">
滑出的元素
</div>
</div>
<script>
$(function(){
$(window).scroll(function(){
slideIn($(".animate-box"),150);
});
function slideIn(obj,left){
var targetHeight = obj.offset().top; //目标元素到顶部的距离
var scrollTop = $(window).scrollTop(); //页面滚动的距离
if(scrollTop>targetHeight-400){
obj.animate({left:left+'px',opacity:1,filter:'Alpha(opacity=90)'},500);
}
};
});
</script>
</body>
</html>