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html 代码
<!DOCTYPE html>
<html>
<head>
<meta charset=”utf-8″ />
<title></title>
<style type=”text/css”>
* {
margin: 0;
padding: 0;
}
#bg {
width: 100%;
height: 100%;
background: black url(img/bg.jpg) no-repeat center;
position: fixed;
background-size: cover;
}
.xx {
width: 18px;
height: 18px;
position: absolute;
color: white;
}
</style>
</head>
<body>
<div id=”bg”></div>
<script
type=”text/javascript”
></script>
<script type=”text/javascript”>
function Fireworm() {
//萤火虫构造器
this.element = $(“<div class=’xx’>*</div>”)
}
Fireworm.prototype.show = function() {
//显示
this.element.css({
top: this.pointY + ‘px’,
left: this.pointX + ‘px’,
})
$(‘body’).append(this.element)
return this
}
Fireworm.prototype.newPoint = function() {
//随机位置
this.pointX = randomInt(window.innerWidth – 100) //获取宽度
this.pointY = randomInt(window.innerHeight – 100) //获取高度
return this //为了继续使用后面的方法
}
Fireworm.prototype.speed = function() {
//速度
//0 – 9 5000-14000毫秒
this.speedRun = (randomInt(10) + 5) * 1000
//alert(this.speedRun)
return this
}
Fireworm.prototype.fly = function() {
//飞
var self = this
this.element.animate(
{ top: this.pointY, left: this.pointX },
this.speedRun,
function() {
self.speed()
.newPoint()
.fly()
},
)
}
function randomInt(max) {
//随机生成一个整数
// 0 <= randomInt < max
return Math.floor(Math.random() * max)
}
$(function() {
var totle = 30
var fireworm = []
for (var i = 0; i < totle; i++) {
fireworm[i] = new Fireworm()
fireworm[i]
.newPoint()
.show()
.speed()
.newPoint()
.fly()
}
})
</script>
</body>
</html>
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970106_lzh 2年前 (2021-01-08)说：
huihui 3年前 (2020-10-20)说：
Satisfy 3年前 (2020-06-05)说：
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