Function default

default(src: string, type?: string): Promise<HTMLScriptElement>
Parameters
- src: string
  脚本链接
- type: string = 'text/javascript'
  脚本类型，默认为 'text/javascript'
Returns Promise<HTMLScriptElement>
脚本加载成功或失败后返回
Example
```
import asyncLoadJS from '@/dlf/common/asyncLoadJS';
asyncLoadJs('https://a_js_script_to_load.js')
.then(() => console.log('load success'))
.catch(() => console.error('load fail'));
```