首先需要获取屏幕大小:
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var screenWidth = document.documentElement.clientWidth;
var screenHeight = document.documentElement.clientHeight;
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接着可以定义动画(星星透明度):
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@keyframes flash {
0% {opacity: 0 }
25% {opacity: 0.25 }
50% {opacity: 0.5 }
75% {opacity: 0.75 }
100% {opacity: 1 }
}
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全部代码如下:
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<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "UTF-8" >
< title >Title</ title >
< style >
div{
width: 70px;
height: 80px;
background: url("./images/star.jpg") no-repeat;
animation: flash 1s;
}
body{
background-color: black
}
@keyframes flash {
0%{opacity: 0}
25%{opacity: 0.25}
50%{opacity: 0.5}
75%{opacity: 0.75}
100%{opacity: 1}
}
</ style >
</ head >
< body >
< script >
var screenWidth = document.documentElement.clientWidth;
var screenHeight = document.documentElement.clientHeight;
// 生产50个星星
for (let i = 0; i < 50 ; i++) {
var box = document .createElement('div');
document.body.appendChild(box);
x = Math .random()*screenWidth;
y = Math .random()*screenHeight;
box.style.position = 'relative' ;
box.style.left =x+'px';
box.style.right =y+'px';
}
boxList = document .getElementsByTagName("div");
for (let i = 0 ; i < boxList.length; i++) {
boxList[i] .onmouseover = function () {
this.style.transform = 'scale(1.5,1.5)' ;
};
boxList[i] .onmouseout = function () {
this.style.transform = 'scale(1,1)' ;
};
}
</script>
</ body >
</ html >
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效果如下:
以上就是js实现星星海特效的示例的详细内容,更多关于js 星星海特效的资料请关注服务器之家其它相关文章!
原文链接:https://www.cnblogs.com/manbaout/p/13233995.html