51 lines
1.3 KiB
JavaScript
51 lines
1.3 KiB
JavaScript
/* global assetPath */
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const _loaded = {};
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function loadWithTag(path, cb) {
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const head = document.getElementsByTagName('head')[0];
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let s = document.createElement('script');
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s.src = path;
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head.appendChild(s);
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s.onload = s.onreadystatechange = function(_, abort) {
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if (abort || !s.readyState || s.readyState === "loaded" || s.readyState === "complete") {
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s = s.onload = s.onreadystatechange = null;
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if (!abort) { cb(); }
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}
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};
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}
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export default function loadScript(url, opts) {
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opts = opts || {};
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return new Ember.RSVP.Promise(function(resolve) {
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url = Discourse.getURL((assetPath && assetPath(url)) || url);
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// If we already loaded this url
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if (_loaded[url]) { return resolve(); }
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const cb = function() {
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_loaded[url] = true;
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resolve();
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};
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var cdnUrl = url;
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// Scripts should always load from CDN
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if (Discourse.CDN && url[0] === "/" && url[1] !== "/") {
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cdnUrl = Discourse.CDN.replace(/\/$/,"") + url;
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}
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// Some javascript depends on the path of where it is loaded (ace editor)
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// to dynamically load more JS. In that case, add the `scriptTag: true`
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// option.
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if (opts.scriptTag) {
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loadWithTag(cdnUrl, cb);
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} else {
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Discourse.ajax({url: cdnUrl, dataType: "script", cache: true}).then(cb);
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}
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});
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}
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