Pure CSS animation for sakura, rain, snow, firefly and butterfly effects, high performance without affecting SEO
纯 CSS 动画实现樱花、雨、雪、萤火虫和蝴蝶飞舞背景效果，高性能且不影响 SEO
1kB Series Lib Fully functional with gzip code 1kB and keep source code readable

npm i yzhanweather
import YZhanWeather from 'yzhanweather'

<script src="https://cdn.jsdelivr.net/npm/yzhanweather@latest/docs/yzhanweather.min.js"></script>

const yzhanweather = new YZhanWeather()
yzhanweather.run('firefly') // Options: sakura | snow | firefly | rain | butterfly 
yzhanweather.run('firefly', {
  maxDuration: 10 // Default: 10s, this option can determine the speed of animations
})
yzhanweather.clear() // Stop and clear all animations
yzhanweather.destory() // Destory the instance and free up memory

Online Demo
Note: click the select on the left-top to change weather

sakura
snow
firefly
rain
butterfly

We use a page from madfan including a 720P video background, collect data when rendering 40 butterflies at the same time.

• With Old Version
  Note: By GIF and JavaScript in old folder

• With Pure CSS Version

No long tasks, almost negligible CPU and GPU usage

All config including speed, num and css tpl are in conf.js under the src folder.
You could change it and then npm run build your own version.
You can set maxDuration to control the speed of animations without changing the conf.js