I have a collection ( using the Backbone.paginator ) that fetchs a array of models from the server and return to me. This collection is used on my "main view" and on "subviews". In each of these views I have a on("change") event that, in each view, does a particulary thing. I was thinking if I can listen to some "start fetch" event ( similar to the beforeLoad on the jquery) to add a loader gif. Does Backbone provide one of this?
If not.. How can I extend it?
Thanks!
You can extend the Backbone Collection prototype like this:
(function() {
var fetch = Backbone.Collection.prototype.fetch;
Backbone.Collection.prototype.fetch = function() {
this.trigger('beforeFetch');
return fetch.apply(this, arguments);
};
})();
Now you can do something like:
myCollection.on('beforeFetch', function() {
// take care of before fetch business
});