backbone-router.js

var Router = Backbone.Router.extend({
  before: function() {
    console.log('before');
  },

  after: function() {
    console.log('after');
  },

  routes: {
    '': function() {
      console.log(‘index’);
    }
  }
})

var router = new Router();
Backbone.history.start();

router.navigate(''); // 'before' 'index' 'after'