How does module.exports work - node.js

Question

I'm using Express and Mongodb to write my first web app and this is probably a noob question, but let's say I were to define a user model in a file called users.js and then called const User = module.exports = mongoose.model('User', UserSchema) somewhere in the file.
Upon importing users.js (via const User = require([path to users.js]) to some other file in the app, why can I then call new User and have access to the model instead of having to call new users.User?

Answer 1

The standard way to define the model and using the schema in the controller
User.js
//User Model
var mongoose = require('mongoose');
var userSchema = new mongoose.Schema({
id: String,
name: {
type: String,
index: true
},
email: {
type: String,
trim: true,
index: true,
lowercase: true,
unique: true
},
mobile: {
type: String,
trim: true,
index: true,
unique: true,
required: true
},
profilePic: String,
password: { type: String },
locations: [{}],
location: {
type: { type: String, default: 'Point', enum: ['Point'] },
coordinates: { type: [], default: [0, 0] },
name: String,
shortAddress: String
},
address: String,
gender: String,
dob: Date,
signupType: { type: String, enum: ['facebook', 'google'] },
deviceType: String,
createdTime: Date,
updatedTime: Date,
googleToken: String,
facebookToken: String,
fcmToken: String,
facebookLink: String,
facebookId: String,
memberType: String,
deviceId: String,
preferences: [{}],
loginData: [{}],
token:String,
isVerified: Boolean,
isMobileVerified: Boolean,
isEmailVerified: Boolean,
lastSeen: Date
});
// 2D sphere index for user location
userSchema.index({ location: '2dsphere' });
mongoose.model('User', userSchema);
module.exports = mongoose.model('User');
UserController.js
//User Controller
var User = require('./User');
// RETURNS ALL THE USERS IN THE DATABASE
router.get('/', function (req, res) {
User.find({}, function (err, users) {
if (err) return res.status(500).send({ errors: "There was a problem finding the users." });
res.status(200).send(users);
});
});