🐛fix buttery load twice trigger undefined bug

README.md

@@ -12,6 +12,7 @@ Pure CSS animation for sakura, rain, snow, firefly and butterfly effects, high p
 #### Node.js
 ```javascript
 npm i yzhanweather
+import YZhanWeather from 'yzhanweather'
 ```
 #### Browser
 ```html

package.json

@@ -1,6 +1,6 @@
 {
   "name": "yzhanweather",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "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",
   "main": "docs/yzhanweather.min.js",
   "files": [

src/yzhanweather.js

@@ -53,10 +53,9 @@ export default class {
     let {num, html, containerStyle, style, styles, keyframe = {}, keyframes} = CONF[type]
     this.createKeyfarme(keyframe)
     const keyframeNames = this.createKeyfarmes(keyframes)
-    if (typeof style === 'string') style = { '': style }
+    if (typeof style === 'string') style = { '': style }  
     this.createStyles([style['']], n => '.' + (this.container.className = n) + ' div', keyframeNames)
     this.createStyles([containerStyle], _ => '.' + this.container.className, keyframeNames)
-    delete style['']
     this.createRule(style, n => '.' + this.container.className + ' div' + (n[0] === ':' ? '' : ' ') + n)
     this.replaceStyles(styles, config)
     const classNames = this.createStyles(styles, n => ' .' + this.container.className + ' .' + n, keyframeNames)