javascript - How to inherit Express router and also call super inside method? -

express router function want "inherit"/extend

var proto = module.exports = function(options) {   var opts = options || {};    function router(req, res, next) {     router.handle(req, res, next);   }    // mixin router class functions   router.__proto__ = proto;    router.params = {};   router._params = [];   router.casesensitive = opts.casesensitive;   router.mergeparams = opts.mergeparams;   router.strict = opts.strict;   router.stack = [];    return router; }; 

so purpose create own function/class extend express router , override route method accept parameter being able call super.route of express router

i've tried several ways, including util.inherits nothing worked.

if possible please provide explanations also

end goal this:

var testrouter = express.router();  testrouter.route('/test-route', 'aaa' /* param here */)     .get(controller.testwhatever) 

being able override route method add new parameter preserve old functionality.

think example explains looking for

// create class function vehicle(color){   this.color = color; }  // add instance method vehicle.prototype.go = function(){   return "underway in " + this.color; }  // add second class function car(color){   this.color = color; }  // , declare subclass of first car.prototype = new vehicle();  // override instance method car.prototype.go = function(){   return vehicle.prototype.go.call(this) + " car" }  // create instances , see overridden behavior. var v = new vehicle("blue"); v.go() // "underway in blue"  var c = new car("red"); c.go() // "underway in red car"