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How to use native js to create a starry sky effect

php中世界最好的语言Original: 2018-06-04 17:26:532501browse

This time I will show you how to use native js to create a starry sky effect. What are the precautions for using native js to create a starry sky effect? The following is a practical case, let’s take a look.

The code is as follows: //Add the picture to change the path

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
html{height: 100%;}
body{background: url(img/bg.jpg) no-repeat center top/cover;margin: 0;margin: 0;height: 100%;} 
//图片路径修改处
img{width: 20px;position: absolute;}
</style>
</head>
<body>
<script type="text/javascript">
//创建img
function FireWorm(){
this.node=document.createElement("img");
this.node.src="img/1.jpg";  //图片路径修改处
}
//确定img的位置
FireWorm.prototype.getpos=function(){
var Cw=document.documentElement.clientWidth;
var Ch=document.documentElement.clientHeight;
this.Left=Math.floor(Cw*Math.random()-50);
this.Top=Math.floor(Ch*Math.random()-50);
}
//显示img位置
FireWorm.prototype.showpos=function(){
this.getpos();
this.node.style.left=this.Left+"px";
this.node.style.top=this.Top+"px";
document.body.appendChild(this.node);
}
//让img飞
FireWorm.prototype.fly=function(){
this.getpos();
var _this=this;
startMove(this.node,{left:this.Left,top:this.Top},function(){
_this.fly();
})
}
for(var i=0;i<300;i++){
var oFireWorm =new FireWorm();
oFireWorm.showpos();
oFireWorm.fly();
}</script>
</body>
</html>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to php Chinese Other related articles online!

How to use native js to create a starry sky effect

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