60 lines
1.6 KiB
JavaScript
60 lines
1.6 KiB
JavaScript
let callbacks = []
|
|
|
|
function loadedTinymce() {
|
|
// to fixed https://github.com/PanJiaChen/vue-element-admin/issues/2144
|
|
// check is successfully downloaded script
|
|
return window.tinymce
|
|
}
|
|
|
|
const dynamicLoadScript = (src, callback) => {
|
|
const existingScript = document.getElementById(src)
|
|
const cb = callback || function() {}
|
|
|
|
if (!existingScript) {
|
|
const script = document.createElement('script')
|
|
script.src = src // src url for the third-party library being loaded.
|
|
script.id = src
|
|
document.body.appendChild(script)
|
|
callbacks.push(cb)
|
|
const onEnd = 'onload' in script ? stdOnEnd : ieOnEnd
|
|
onEnd(script)
|
|
}
|
|
|
|
if (existingScript && cb) {
|
|
if (loadedTinymce()) {
|
|
cb(null, existingScript)
|
|
} else {
|
|
callbacks.push(cb)
|
|
}
|
|
}
|
|
|
|
function stdOnEnd(script) {
|
|
script.onload = function() {
|
|
// this.onload = null here is necessary
|
|
// because even IE9 works not like others
|
|
this.onerror = this.onload = null
|
|
for (const cb of callbacks) {
|
|
cb(null, script)
|
|
}
|
|
callbacks = null
|
|
}
|
|
script.onerror = function() {
|
|
this.onerror = this.onload = null
|
|
cb(new Error('Failed to load ' + src), script)
|
|
}
|
|
}
|
|
|
|
function ieOnEnd(script) {
|
|
script.onreadystatechange = function() {
|
|
if (this.readyState !== 'complete' && this.readyState !== 'loaded') return
|
|
this.onreadystatechange = null
|
|
for (const cb of callbacks) {
|
|
cb(null, script) // there is no way to catch loading errors in IE8
|
|
}
|
|
callbacks = null
|
|
}
|
|
}
|
|
}
|
|
|
|
export default dynamicLoadScript
|