In today's tutorial, we will be looking at the starting setup for a Node.js, AngularJS, MongoDB, and Express application (otherwise known as MEAN). 

Application Requirements

• Single Page Application
• Node.js backend with Express and MongoDB
• AngularJS frontend

Application Structure

--app #frontend code
    angularjs  #angularjs libary
    js
        controller
            about.js
            contact.js
            home.js
        app.js
    pages
        header.html
        home.html
        about.html
        contact.html

    index.html
--node_modules #npm package
package-lock.json
package.json
server.js # backend Code

Creating a directory:

  To start with, create an empty directory named MEANJS:

mkdir MEANJS

then move inside the newly created directory:

cd MEANJS

Then Run initialize the package.json by running Command: 

npm init

We also need to install Socket.io, which is the main dependency of our project, ExpressJS,Http.

npm install --save express morgan mongoose body-parser method-override multer fs

Creating a server: the code

Create a file named server.js inside your project’s directory. This will hold the actual server

var express  = require('express');
var app      = express();                       
var morgan = require('morgan');   
var mongoose = require('mongoose');
var bodyParser = require('body-parser');
var methodOverride = require('method-override');
var multer  =   require('multer');
var fs = require("fs");
//allow cross origin requests
app.use(function(req, res, next) {
    res.setHeader("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Methods", "POST, PUT, OPTIONS, DELETE, GET");
    res.header("Access-Control-Max-Age", "3600");
    res.header("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");
    next();
});
// configuration
app.use(express.static(__dirname + '/app'));                 // set the static files location /app/img will be /img for users
app.use('/app/uploads',express.static(__dirname + '/app/uploads'));
app.use(morgan('dev'));              
app.use(bodyParser.json({limit: '50mb'}));                          // log every request to the console
app.use(bodyParser.urlencoded({limit: '50mb','extended':'true'}));            // parse application/x-www-form-urlencoded                                // parse application/json
app.use(bodyParser.json({ type: 'application/vnd.api+json' })); // parse application/vnd.api+json as json
 // connect to mongoDB database
mongoose.connect('mongodb://localhost/meanjs');   
var Schema = mongoose.Schema;
// user schema
var userSchema = new Schema({
    user_name: String,
    password: String,
    first_name: String,
    last_name: String,
    user_email:String,
    phone: Number,
    status: String,
    date: { type: Date, default: Date.now }
});
var User = mongoose.model('User', userSchema);
module.exports = User;
// create user
app.post('/api/createUser', function(req, res) {
   User.findOne({ 'user_email' :  req.body.user_email }, function(err, user) {
           // if there are any errors, return the error
           if (err){
               return res.send(err);
           }
           // check to see if there already a user with that email
           if (user) {
               return res.json({"message":"Email already exist"});
           } else {
            User.create(userobj, function(err, user) {
                if (err){
                   res.send(err);
                }
                if(user) {
                   res.json(user);
                }
            });
        }
    });
});
// update user
app.put('/api/updateUser', function(req, res) {
    User.findByIdAndUpdate(req.body._id, req.body, {new: true}, function(err, user) {
        if (err){
            res.send(err);
        }

        res.json(user);
    });
});
// delete user
app.delete('/api/removeUser', function(req, res) {
    User.remove({
        _id : req.body._id
    }, function(err, user) {
        if (err)
            res.send(err);
        res.json(user);
    });
});
// get users
app.post('/api/getUsers', function(req, res) {
    User.find(req.body,function(err, users) {
        if (err)
            res.send(err)
        res.json(users);
    });
});
app.listen(process.env.PORT || 9000, function(){console.log("App listening on port 9000");});

Save the above code and run it with the following command.

node server.js

Output : 

After creating server-side code then please click this link for to frontend side : 

http://codesolution.co.in/detail/post/angularjs-nested-routing--using-ui-routing---10-minutes

Thanks : )

Github Link: https://github.com/Sudarshan101/Meanjs