满天星星闪烁动画效果：
(可用星空动画来作为页面背景，白色文字改为文章或者其他的O(∩_∩)O)
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>jQuery夜晚天空满天星星闪烁动画</title>
<script src="js/jquery.min.js"></script>
<style>
* {
box-sizing: border-box;
padding: 0;
margin: 0;
}
body {
background: #22313f;
}
#starsBox {
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: rgba(0, 0, 0, 0.75);
opacity: .5;
}
#starsBox span {
display: inline-block;
width: auto;
position: absolute;
border-radius: 100%;
transition: 100s linear;
}
p {
position: fixed;
top: 50%;
left: 0;
right: 0;
text-align: center;
transform: translateY(-50%);
font-size: 40px;
font-weight: 900;
color: white;
text-shadow: 0 0 50px black;
text-transform: capitalize;
font-family: ‘Roboto‘,‘Helvetica‘,‘Arial‘,sans-serif;
letter-spacing: 5px;
}
p > span {
display: block;
font-size: 12px;
color: #bdc3c7;
margin-top: 30px;
font-weight: 100;
text-shadow: 0 0 50px black;
letter-spacing: 3px;
}
p > span > a {
font-weight: 700;
text-decoration: none;
color: #d64541;
padding-bottom: 2px;
border-bottom: 0px solid #d64541;
transition: 0.5s;
}
p > span > a:hover {
padding-bottom: 5px;
border-bottom: 2px solid #d64541;
}
</style>
</head>
<body>
<div id="starsBox"></div>
<p>Gary</p>
<script type="text/javascript">
var cols = [‘#f5d76e‘,‘#f7ca18‘,‘#f4d03f‘,‘#ececec‘,‘#ecf0f1‘,‘#a2ded0‘];
var stars = 250;
for (var i = 0; i <= stars; i++) {
var size = Math.random()*3;
var color = cols[parseInt(Math.random()*4)];
$(‘#starsBox‘).prepend(‘<span style=" width: ‘ + size + ‘px; height: ‘ + size + ‘px; top: ‘ + Math.random()*100 + ‘%; left: ‘ + Math.random()*100 + ‘%; background: ‘ + color + ‘; box-shadow: 0 0 ‘+ Math.random()*10 +‘px‘ + color + ‘;"></span>‘) ;
};
setTimeout(function(){
$(‘#starsBox span‘).each(function(){
$(this).css(‘top‘, Math.random()*100 + ‘%‘).css(‘left‘, Math.random()*100 + ‘%‘);
});
}, 1);
setInterval(function(){
$(‘#starsBox span‘).each(function(){
$(this).css(‘top‘, Math.random()*100 + ‘%‘).css(‘left‘, Math.random()*100 + ‘%‘);
});
}, 100000);
</script>
</body>
</html>
index.html
text-transform属性，可以轻易地实现英文字母大小写转换
capitalize; 单词首个字母大写
uppercase; 全部大写
lowercase; 全部小写
实现过程
Math.random()是令系统随机选取大于等于0.0且小于1.0的伪随机double值
<script type="text/javascript">
var cols = [‘#f5d76e‘,‘#f7ca18‘,‘#f4d03f‘,‘#ececec‘,‘#ecf0f1‘,‘#a2ded0‘];
var stars = 250;
for (var i = 0; i <= stars; i++) {
var size = Math.random()*3;
var color = cols[parseInt(Math.random()*4)];
$(‘#starsBox‘).prepend(‘<span style=" width: ‘ + size + ‘px; height: ‘ + size + ‘px; top: ‘ + Math.random()*100 + ‘%; left: ‘ + Math.random()*100 + ‘%; background: ‘ + color + ‘; box-shadow: 0 0 ‘+ Math.random()*10 +‘px‘ + color + ‘;"></span>‘) ;
};
setTimeout(function(){
$(‘#starsBox span‘).each(function(){
$(this).css(‘top‘, Math.random()*100 + ‘%‘).css(‘left‘, Math.random()*100 + ‘%‘);
});
}, 1);
setInterval(function(){
$(‘#starsBox span‘).each(function(){
$(this).css(‘top‘, Math.random()*100 + ‘%‘).css(‘left‘, Math.random()*100 + ‘%‘);
});
}, 100000);
</script>
关键代码
定义size为随机数，用于生成随机颜色和闪烁点随机距离
var size = Math.random()*3; var color = cols[parseInt(Math.random()*4)];
设置星星闪烁、大小和颜色
$(‘#starsBox‘).prepend(‘<span style=" width: ‘ + size + ‘px; height: ‘ + size + ‘px; top: ‘ + Math.random()*100 + ‘%; left: ‘ + Math.random()*100 + ‘%; background: ‘ + color + ‘; box-shadow: 0 0 ‘+ Math.random()*10 +‘px‘ + color + ‘;"></span>‘) ; };
到达随机时间后星星闪烁和移动发生变化
setTimeout(function(){
$(‘#starsBox span‘).each(function(){
$(this).css(‘top‘, Math.random()*100 + ‘%‘).css(‘left‘, Math.random()*100 + ‘%‘);
});
}, 1);
设置每个星星之间的随机间隔
setInterval(function(){
$(‘#starsBox span‘).each(function(){
$(this).css(‘top‘, Math.random()*100 + ‘%‘).css(‘left‘, Math.random()*100 + ‘%‘);
});
}, 100000);
原文地址：https://www.cnblogs.com/1138720556Gary/p/9374845.html
时间： 2024-10-01 03:14:44