Caching Region for Marionette.js

CachingRegion.js

define(['marionette', 'underscore'], function (Marionette, _) {
    /**
     * @class CachingRegion
     */
    return Marionette.Region.extend({
        show: function (view) {
            this.ensureEl();
            this.currentView = view;

            if (!_.isUndefined(view.cached)) {
                this.open(view);

                Marionette.triggerMethod.call(this, 'show', view);
                Marionette.triggerMethod.call(view, 'show');
                return;
            }

            view.cached = true;
            view.render();
            this.open(view);

            Marionette.triggerMethod.call(this, 'show', view);
            Marionette.triggerMethod.call(view, 'show');
        }
    });
});