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copied!<p>One more thing about jQuery UI's datepicker widget as a EmberJS Mixin. If you want to supply a callback function to handle the beforeShowDay event, you will raise this error:</p> <pre><code>Uncaught TypeError: Cannot read property '0' of undefined </code></pre> <p>even if your callback function (in your ember view) return an array, like it's specified in the jqueryui doc</p> <pre><code> beforeShowDay: function(date){ some code... return [true, '']; }; </code></pre> <p>This happens because nothing is returned after the callback.call in the _gatherEvents function</p> <pre><code> _gatherEvents: function(options) { var uiEvents = this.get('uiEvents') || [], self = this; uiEvents.forEach(function(event) { var callback = self[event]; if (callback) { // You can register a handler for a jQuery UI event by passing // it in along with the creation options. Update the options hash // to include any event callbacks. options[event] = function(event, ui) { callback.call(self, event, ui); }; } }); } </code></pre> <p>I fix this by adding a return statement before the callback.call.</p> <pre><code>_gatherEvents: function(options) { var uiEvents = this.get('uiEvents') || [], self = this; uiEvents.forEach(function(event) { var callback = self[event]; if (callback) { // You can register a handler for a jQuery UI event by passing // it in along with the creation options. Update the options hash // to include any event callbacks. options[event] = function(event, ui) { return callback.call(self, event, ui); }; } }); } </code></pre> <p>working example <a href="http://jsfiddle.net/thibault/qf3Yu/" rel="nofollow">http://jsfiddle.net/thibault/qf3Yu/</a></p>

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