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Spiegel von https://github.com/paviliondev/discourse-custom-wizard.git synchronisiert 2024-09-20 07:41:11 +02:00
discourse-custom-wizard/assets/javascripts/wizard/lib/load-script.js.es6
2018-02-08 12:30:55 +08:00

92 Zeilen
2,4 KiB
JavaScript

import { ajax } from 'wizard/lib/ajax';
const _loaded = {};
const _loading = {};
function loadWithTag(path, cb) {
const head = document.getElementsByTagName('head')[0];
let finished = false;
let s = document.createElement('script');
s.src = path;
if (Ember.Test) {
Ember.Test.registerWaiter(() => finished);
}
head.appendChild(s);
s.onload = s.onreadystatechange = function(_, abort) {
finished = true;
if (abort || !s.readyState || s.readyState === "loaded" || s.readyState === "complete") {
s = s.onload = s.onreadystatechange = null;
if (!abort) {
Ember.run(null, cb);
}
}
};
}
export function loadCSS(url) {
return loadScript(url, { css: true });
}
export default function loadScript(url, opts) {
// TODO: Remove this once plugins have been updated not to use it:
if (url === "defer/html-sanitizer-bundle") { return Ember.RSVP.Promise.resolve(); }
opts = opts || {};
$('script').each((i, tag) => {
const src = tag.getAttribute('src');
if (src && (opts.scriptTag || src !== url)) {
_loaded[tag.getAttribute('src')] = true;
}
});
return new Ember.RSVP.Promise(function(resolve) {
url = Discourse.getURL(url);
// If we already loaded this url
if (_loaded[url]) { return resolve(); }
if (_loading[url]) { return _loading[url].then(resolve);}
let done;
_loading[url] = new Ember.RSVP.Promise(function(_done){
done = _done;
});
_loading[url].then(function(){
delete _loading[url];
});
const cb = function(data) {
if (opts && opts.css) {
$("head").append("<style>" + data + "</style>");
}
done();
resolve();
_loaded[url] = true;
};
let cdnUrl = url;
// Scripts should always load from CDN
// CSS is type text, to accept it from a CDN we would need to handle CORS
if (!opts.css && Discourse.CDN && url[0] === "/" && url[1] !== "/") {
cdnUrl = Discourse.CDN.replace(/\/$/,"") + url;
}
// Some javascript depends on the path of where it is loaded (ace editor)
// to dynamically load more JS. In that case, add the `scriptTag: true`
// option.
if (opts.scriptTag) {
if (Ember.testing) {
throw `In test mode scripts cannot be loaded async ${cdnUrl}`;
}
loadWithTag(cdnUrl, cb);
} else {
ajax({url: cdnUrl, dataType: opts.css ? "text": "script", cache: true}).then(cb);
}
});
}