chosenHandlers is not a function error in nodejs

Question

So, I've been trying to make my first node.js project with a Skillshare teacher, however, while he doesn't run into this error, I did. I've read the code over but there is very little that I can do when I am a beginner to node.js. Here is the code. I would appreciate it if you can help me debug what is going on. I thank you in advance.

var http = require('http');
var url = require('url');
var StringDecoder = require('string_decoder').StringDecoder;
var server = http.createServer(function(req, res) {

    //parse the URL
    var parsedURL = url.parse(req.url, true);

    //get the path
    var path = parsedURL.pathname;
    var trimmedPath = path.replace(/^\/+|\/+$/g, '')

    //queryString
    var queryStringObject = parsedURL.query;

    //get the HTTP method
    var method = req.method.toLowerCase();

    //get the headers as an object
    var headers = req.headers;

    //get the payload, if any
    var decoder = new StringDecoder('utf-8');
    var buffer = '';
    req.on('data', function(data) {
        buffer += decoder.write(data); 
    }); 
    req.on('end', function() {
        buffer += decoder.end();

        //Choose the handler this request should go to
        var chosenHandler = typeof(router[trimmedPath]) !=='underfined' ? router[trimmedPath] : handlers.notfound;

        //Construct the data object to send the handler
        var data = {
            'trimmedPath' : trimmedPath,
            'queryStringObject' : queryStringObject,
            'method' : method,
            'headers' : headers,
            'payload' : buffer
        };

        //Route the request to the handler
        chosenHandler(data, function(statusCode, payload) {
            statusCode = typeof(statusCode) == 'number' ? statusCode: 200;

            payload = typeof(payload) == 'object' ? payload : {};

            var payloadString = JSON.stringify(payload);
            res.writeHead(statusCode);

            res.end(payloadString)

            //Log the path
            console.log('Returning this respond: ', statusCode, payloadString);

        });        
    });
});


server.listen(3000, function() {
    console.log("Listening on port 3000")
});


//define the handler
var handlers = {};


//sample handler
handlers.sample = function(data,callback) {
    callback(406, {'name' : 'sample handler'})
};

//not found handler
handlers.notfound = function(data, callback) {
    callback(404);
};


//define a request router

var router = {
    'sample' : handlers.sample

};

Answer 1

var chosenHandler = router[trimmedPath] || handlers.notfound;