var someWidget = {
    init: function(container){
    	this.container = container;

    	$(this.container).on('click', '.item', this.onItemClick);
    	// https://api.jquery.com/on/
    },

    dispose: function(){
    	$(this.container).off('click', '.item', this.onItemClick);
    	// https://api.jquery.com/off/
    }

    onItemClick: function(){
    	//some processor
    }
}