backbone-router.js

// Which do you prefer more?

// trigger event and get out
var vent = _.extend({}, Backbone.Events);

App.Router = Backbone.Router.extend({
	routes: {
		'show/:id': 'show'
	},
	show: function(id) {
		vent.trigger('thing:show', id);
	}
});


// Or, perform logic
App.Router = Backbone.Router.extend({
	routes: {
		'show/:id': 'show'
	},
	show: function(id) {
		var thing = new Thing({ name: 'Joe'});
		var thingView = new ThingView({ model: thing });
		$(document.body).append(thingView.render().el);
	}
});

prefer "trigger event", cause that way the event is reusable for other callbacks.

Ditto dilab

+1 for the first approach for basically the same reason.

perform logic was simple

of-course 1st one because of the reason given by dilab.