61 lines
1.6 KiB
JavaScript
61 lines
1.6 KiB
JavaScript
/**
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* loadJS 异步加载远程JS
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* @constructor
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* @param {string} src - 必填，需要加载的URL路径
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* @param {string} keyName - 必填，唯一key和JS返回的全局的对象名
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* @param {string} callbackName - 非必填，如果远程JS有callback，则可更有效的判断是否完成加载
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*/
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export function loadJS (src, keyName, callbackName) {
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return new Promise((resolve, reject) => {
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let has = document.head.querySelector("script[loadKey="+keyName+"]")
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if(has){
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return resolve(window[keyName])
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}
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let script = document.createElement("script")
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script.type = "text/javascript"
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script.src = src
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script.setAttribute("loadKey", keyName)
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document.head.appendChild(script)
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script.onload = () => {
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if(callbackName){
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window[callbackName] = () => {
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return resolve(window[keyName])
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}
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}else{
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setTimeout(()=>{
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return resolve(window[keyName])
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},50)
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}
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}
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script.onerror = (err) => {
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return reject(err)
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}
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})
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}
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/**
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* loadCSS 异步加载远程css
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* @constructor
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* @param {string} src - 必填，需要加载的URL路径
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* @param {string} keyName - 必填，唯一key
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*/
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export function loadCSS (src, keyName) {
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return new Promise((resolve, reject) => {
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let has = document.head.querySelector("link[loadKey="+keyName+"]")
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if(has){
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return resolve()
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}
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let link = document.createElement('link')
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link.rel = "stylesheet"
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link.href = src
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link.setAttribute("loadKey", keyName)
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document.head.appendChild(link)
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link.onload = () => {
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return resolve()
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}
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link.onerror = (err) => {
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return reject(err)
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}
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})
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}
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