foo.js

require.config({
    
    paths: {
        use: '/public/js/lib/use',
        json2: 'http://cdnjs.cloudflare.com/ajax/libs/json2/20110223/json2',
        jquery: 'http://cdnjs.cloudflare.com/ajax/libs/jquery/1.7.2/jquery.min',
        backbone: 'http://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min',
        underscore: 'http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.3.1/underscore-min'
    },
    
    use: {
        
        underscore: {
            attach: '_'
        },
        
        json2: {
            attach: 'JSON'
        },
        
        backbone: {
            
            deps: ['use!json2', 'use!underscore', 'jquery'],
            attach: function (JSON, _, $) {
                return Backbone
            }
            
        }
        
    }
    
})


require(['use!backbone'], function (Backbone) {
    
    // define route handler
    var ApplicationRouter = Backbone.Router.extend({
        
        routes: {
            
            '/': 'list'
            
        },
        
        list: function () {
            
            console.log('list')
            
        }
        
    })
    
    // instantiate route handler
    var router = new ApplicationRouter
    
    // start backbone history manager
    Backbone.history.start()
    
})