Learn Node.js fundamentals, build modules, REST APIs, and applications using Express, Passport.js, and Socket.IO.

docker.tar.gz

Chapter 1

Chapter 2 Chapter 3.1

Chapter 3.2

Chapter 4.1

Chapter 3.3

Chapter 4.2-Postman

Chapter 5-Postman

Chapter 6.1

Chapter 2-Exercise

Chapter 4.2-Postman-copy

Chapter 5-Postman-copy

Built on Chrome’s V8 JavaScript engine, Node.js is a runtime environment that enables JavaScript to run outside the browser. This course will help you learn the fundamentals of Node.js to build portable applications.

You’ll learn about the components and build patterns of Node.js. You’ll also explore the API to learn how to create modules and write code to unique data files. Moreover, you’ll delve into the features and practices of JavaScript and build a REST API using the Express framework from scratch. This will set up authentication tokens with Passport.js and JSON web tokens, and finally build a live trivia game with Socket.IO.

By the end of this course, you’ll be equipped with the extensive knowledge to build rich and comprehensive Node.js applications running on the server with JavaScript.

Learn Node.js from Scratch

`SyntaxError: Assignment to constant variable.`

`TypeError: Assignment to constant variable.`

What will be the output of the following code?

```js
const name = "Robert";
name = "Robbie";
console.log(name);
```

What will be the output of the following code?
<pre><code class="language-js">const name = &quot;Robert&quot;;
name = &quot;Robbie&quot;;
console.log(name);
</code></pre>

**(True or False)** The `var` variables can’t be updated and redeclared within their scope. The `let` variables can be updated but not redeclared within their scope.

(True or False) The <code>var</code> variables can’t be updated and redeclared within their scope. The <code>let</code> variables can be updated but not redeclared within their scope.

What will be the output of the following code?

```js
let { a, b, ...pairs } = { a: 10, b: 20, c: 30, d: 40 };
console.log(pairs);
```

What will be the output of the following code?
<pre><code class="language-js">let { a, b, ...pairs } = { a: 10, b: 20, c: 30, d: 40 };
console.log(pairs);
</code></pre>

**(True or False)** The arrow function syntax below is valid, and when called, the function will return the output of multiplying `a` and `b`:

```js
const multiply = a, b => a * b;
```

(True or False) The arrow function syntax below is valid, and when called, the function will return the output of multiplying <code>a</code> and <code>b</code>:
<pre><code class="language-js">const multiply = a, b =&gt; a * b;
</code></pre>

A function that is nested inside of another function and has access to variables declared in its local scope and in the outer function’s scope but not in the global scope

A function that provides access to variables declared in its local scope to other functions

A function that is nested inside another function and has access to variables declared in its local scope, the outer function’s scope, and the global scope

What is the correct definition of a closure?

What is the correct definition of a closure?

Check your understanding of what you've learned in this chapter by taking this quiz.

Before We Begin

Node.js Overview

The Node.js API

JavaScript Essentials Review

Building a RESTful API with Express

Authentication with Passport.js and JSON Web Tokens

Build a Live Trivia Game with Socket.IO

Wrap Up!

Appendix

Quiz Yourself on JavaScript Essentials