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FIX: guard against concurrent loading of deferred assets

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Sam 2015-05-22 15:07:04 +10:00
parent de3e48c16e
commit ada7b4a4e8
1 changed files with 12 additions and 0 deletions
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12
app/assets/javascripts/discourse/lib/load-script.js.es6
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@ -1,6 +1,7 @@
/* global assetPath */
const _loaded = {};
const _loading = {};
function loadWithTag(path, cb) {
const head = document.getElementsByTagName('head')[0];
@ -29,9 +30,20 @@ export default function loadScript(url, opts) {
// If we already loaded this url
if (_loaded[url]) { return resolve(); }
if (_loading[url]) { return _loading[url].then(resolve);}
var done;
_loading[url] = new Ember.RSVP.Promise(function(_done){
done = _done;
});
_loading[url].then(function(){
delete _loading[url];
});
const cb = function() {
_loaded[url] = true;
done();
resolve();
};