js写一个将图片向上淡出第二张图片从下往上淡入
这种通常用class切换状态比较好，一下是两张图片淡入淡出demo。通过js控制一个dom元素的class状态，可以产生想要的过渡动画
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style type="text/css">
body{
background: #ccc;
}
.content{
position: absolute;
top: 30%;
}
#box1{
position: absolute;
border: 1px solid red;
transition: all 1s;/*过渡时间*/
}
#box2{
position: absolute;
border: 1px solid red;
transition: all 1s;/*过渡时间*/
}
.up{
/*图片向上状态*/
-webkit-transform: translateY(-100%);
transform: translateY(-100%);
opacity: 0;
}
.down{
/*图片向下状态*/
-webkit-transform: translateY(100%);
transform: translateY(100%);
opacity: 0;
}
</style>
</head>
<body>
<button onclick="fadeInOut()">淡入淡出</button>
<div class="content">
<!--图片1-->
<div id="box1" class=""><img src="https://www.baidu.com/img/superlogo_c4d7df0a003d3db9b65e9ef0fe6da1ec.png"/></div>
<!--图片2-->
<div id="box2" class="down"><img src="https://ss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/image/w%3D500/sign=c27d4835de3f8794d3ff482ee21a0ead/024f78f0f736afc3290994e8b919ebc4b7451231.jpg"/></div>
</div>
<script>
function fadeInOut(){
console.log(1)
document.getElementById("box1").className="up";
document.getElementById("box2").className="";
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style type="text/css">
body{
background: #ccc;
}
.content{
position: absolute;
top: 30%;
}
#box1{
position: absolute;
border: 1px solid red;
transition: all 1s;/*过渡时间*/
}
#box2{
position: absolute;
border: 1px solid red;
transition: all 1s;/*过渡时间*/
}
.up{
/*图片向上状态*/
-webkit-transform: translateY(-100%);
transform: translateY(-100%);
opacity: 0;
}
.down{
/*图片向下状态*/
-webkit-transform: translateY(100%);
transform: translateY(100%);
opacity: 0;
}
</style>
</head>
<body>
<button onclick="fadeInOut()">淡入淡出</button>
<div class="content">
<!--图片1-->
<div id="box1" class=""><img src="https://www.baidu.com/img/superlogo_c4d7df0a003d3db9b65e9ef0fe6da1ec.png"/></div>
<!--图片2-->
<div id="box2" class="down"><img src="https://ss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/image/w%3D500/sign=c27d4835de3f8794d3ff482ee21a0ead/024f78f0f736afc3290994e8b919ebc4b7451231.jpg"/></div>
</div>
<script>
function fadeInOut(){
console.log(1)
document.getElementById("box1").className="up";
document.getElementById("box2").className="";
}
</script>
</body>
</html>
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