xp-loadjs

动态导入js，支持promise

$3

``js
import loadjs from 'xp-loadjs'

// single file
loadjs('https://cdn.bootcss.com/jquery/3.3.1/jquery.js')
.then(() => {
console.log('load success')
})
.catch(() => {
console.log('load error')
})

// custom dataset
//
loadjs({
url: 'https://cdn.bootcss.com/jquery/3.3.1/jquery.js',
extraPropMap: {
id: 1
}
})

// multiple files
loadjs(['https://cdn.bootcss.com/jquery/3.3.1/jquery.js', 'https://cdn.bootcss.com/lodash.js/4.17.4/lodash.js'])
.then(() => {
console.log('load success')
})
.catch(() => {
console.log('load error')
})
``