1.效果图
思路:首先 搭建好 一个 ‘< i >’ 的样式 还用下落的动画
接着使用for循环 创建多个 并添加到body中
2.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Colorful Rain</title>
<link rel="stylesheet" href="./index.css">
</head>
<body>
<script src="./index.js"></script>
</body>
</html>
3css/scss scss编译后就是css 使用css即可
3.1scss
*{
margin: 0;
padding: 0;
}
body{
background-color: #000;
min-height: 100vh;
}
i{
position: absolute;
height: 200px;
width: 4px;
border-radius: 0 0 4px 4px;
background-image: linear-gradient(transparent,#fff);
animation: move 5s linear infinite;
}
i:nth-child(3n+1){
background-image: linear-gradient(transparent,rgb(241, 15, 15));
}
i:nth-child(3n+2){
background-image: linear-gradient(transparent,rgb(14, 236, 218));
}
i:nth-child(3n+3){
background-image: linear-gradient(transparent,rgb(36, 12, 248));
}
@keyframes move {
0%{
transform: translateY(-200px);
}
100%{
transform: translateY(calc(100vh + 200px));
}
}
3.2css
- {
margin: 0;
padding: 0;
}
body {
background-color: #000;
min-height: 100vh;
}
i {
position: absolute;
height: 200px;
width: 4px;
border-radius: 0 0 4px 4px;
background-image: linear-gradient(transparent, #fff);
-webkit-animation: move 5s linear infinite;
animation: move 5s linear infinite;
}
i:nth-child(3n + 1) {
background-image: linear-gradient(transparent, #f10f0f);
}
i:nth-child(3n + 2) {
background-image: linear-gradient(transparent, #0eecda);
}
i:nth-child(3n + 3) {
background-image: linear-gradient(transparent, #240cf8);
}
@-webkit-keyframes move {
0% {
transform: translateY(-200px);
}
100% {
transform: translateY(calc(100vh + 200px));
}
}
@keyframes move {
0% {
transform: translateY(-200px);
}
100% {
transform: translateY(calc(100vh + 200px));
}
}
4js
var count=100
var i=1
while (i<=count) {
//创建 i
var Ele=document.createElement("i")
//i 的宽度
var EleW=Math.random()*5
//i的 left 屏幕距离
// left 就是屏幕的宽度随便跑
var wd=document.documentElement.clientWidth
var EleLeft=Math.random()*(wd-EleW)+EleW
//i 动画的随机时间1-5s
var durTime=Math.random()*4+1
//i 延迟时间
var DelyTime=Math.random()*2
//添加样式
Ele.style.width=EleW+'px';
Ele.style.left=EleLeft+'px';
Ele.style.animationDuration=durTime+'s';
Ele.style.animationDelay=DelyTime+'s'
//插入页面
document.body.append(Ele)
i++
}