js飘落星星 基于JavaScript实现飘落星星特效
爱吃炒饭的逗比小豆豆 人气:0想了解基于JavaScript实现飘落星星特效的相关内容吗，爱吃炒饭的逗比小豆豆在本文为您仔细讲解js飘落星星的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：js飘落星星特效,js星星特效,js飘落星星，下面大家一起来学习吧。
1.效果图
2.代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
img{
position: absolute;
}
body {
background-image: url(img/bg.jpg);
background-size: 100%;
}
</style>
<script>
function Star() {
this.speed=10;
this.img=new Image();
this.img.src="img/star"+parseInt(Math.random()*4+1)+".png";
this.img.style.width=50+'px';
this.img.style.height=50+'px';
this.img.style.top=Math.random()*window.innerHeight+1+'px';
this.img.style.left=Math.random()*window.innerWidth+1+'px';
document.body.appendChild(this.img);
}
Star.prototype.slip=function () {
var that=this;
function move() {
that.img.style.top=that.img.offsetTop+that.speed+'px';
console.log(that.img.offsetTop+"star");
console.log(window.innerHeight+"window");
if(that.img.offsetTop>window.innerHeight){
clearInterval(sh);
that.img.style.height=0;
that.img.style.width=0;
}
}
var sh=setInterval(move,100);
}
setInterval(function () {
for(var i=1;i<5;i++){
new Star().slip();
}
},1000)
</script>
</head>
<body>
</body>
</html>
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