A router for Knockout.js

router.js

var ko = require('knockout');
var crossroads = require('crossroads');
var hasher = require('hasher');

function parseHash(newHash, oldHash) { 
    crossroads.parse(newHash); 
}

function Router(routes) {
    var self = this;
    
    this.currentRoute = ko.observable({});
    
    routes.forEach(function(route) {
        crossroads.addRoute(route.url, function(requestParams) {
            self.currentRoute(ko.utils.extend(requestParams, route.params));
        });
        
        if (route.url === '404') {
            crossroads.bypassed.add(function(request){
                self.currentRoute(ko.utils.extend({ request: request }, route.params));
            });
        }
    });

    
    crossroads.normalizeFn = crossroads.NORM_AS_OBJECT;
    hasher.initialized.add(parseHash);
    hasher.changed.add(parseHash);
    hasher.init();
}
    
module.exports = Router;