纯js实现图片匀速淡入淡出效果
程序员文章站
2022-04-29 08:03:44
图片匀速淡入淡出效果如下：
...
图片匀速淡入淡出效果如下：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>淡入效果</title>
<style>
* {
margin: 0;
padding: 0;
}
div {
border: 2px solid #aaa;
}
img {
width: 300px;
height: 300px;
filter: alpha(opacity:30);
opacity: .3;
margin: 0 auto;
}
</style>
</head>
<body>
<div>
<img src="img/timg.jpg" alt="" id="img">
</div>
<script>
var alpha=30;
var img = document.getelementbyid("img");
img.onmouseover=function(){
startmove(100)
};
img.onmouseout=function(){
startmove(30)
}
var timer;
function startmove(tar) {
var img = document.getelementbyid("img");
clearinterval(timer);
timer = setinterval(function () {
var ispeed=0;
ispeed= alpha<tar?5:-5;
if(alpha==tar){
clearinterval(timer)
}
else{
alpha+=ispeed;
img.style.filter="alpha(opacity:"+alpha+")";
img.style.opacity=alpha/100;
}
}, 30)
}
</script>
</body>
</html>
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