Hands-On Data Structures and Algorithms with JavaScript

Creating a web server

We can now add a route to access this graph and its corresponding shortestPath method.  Let's first create the route under routes/references and add it as a middleware to the web server:

var express = require('express');var app = express();var bodyParser = require('body-parser');// register endpointsvar references = require('./routes/references');// middleware to parse the body of input requestsapp.use(bodyParser.json());// route middlewareapp.use('/references', references);// start serverapp.listen(3000, function () {   console.log('Application listening on port 3000!');});

Then, create the route as shown in the following code:

var express = require('express');var router = express.Router();var Graph = require('../utils/graph' ...