动态脚本加载

动态脚本加载

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export default function remoteLoad (url, hasCallback) {
return createScript(url)
/**
* 创建script
* @param url
* @returns {Promise}
*/
function createScript (url) {
var scriptElement = document.createElement('script')
document.body.appendChild(scriptElement)
var promise = new Promise((resolve, reject) => {
scriptElement.addEventListener('load', e => {
removeScript(scriptElement)
if (!hasCallback) {
resolve(e)
}
}, false)
scriptElement.addEventListener('error', e => {
removeScript(scriptElement)
reject(e)
}, false)
if (hasCallback) {
window.____callback____ = function () {
resolve()
window.____callback____ = null
}
}
})
if (hasCallback) {
url += '&callback=____callback____'
}
scriptElement.src = url
return promise
}
/**
* 移除script标签
* @param scriptElement script dom
*/
function removeScript (scriptElement) {
document.body.removeChild(scriptElement)
}
}
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