Gain insights into Node.js, its components, and build patterns. Explore APIs, create modules, and build a REST API using Express. Discover authentication with Passport.js and JSON web tokens.

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

Next, use `socket.broadcast.to` to send a `message` event to let all other players in the room know when a new player has joined the game.

## Task 7: Let players know a new player has joined with `socket.broadcast.to`
Next, we’ll use `socket.broadcast.to` to send a `message` event to let all other players in the room know when a new player has joined the game

1. Add the highlighted code in the `src/index.js` file:

io.on('connection', () => {
  console.log('A new player just connected');

  socket.on('join', ({ playerName, room }, callback) => {
    const { error, newPlayer } = addPlayer({ id: socket.id, playerName, room });

    if (error) return callback(error.message);

    socket.join(newPlayer.room);

    socket.emit('message', formatMessage('Admin', 'Welcome!'));

    socket.broadcast
      .to(newPlayer.room)
      .emit(
        'message',
        formatMessage('Admin', `${newPlayer.playerName} has joined the game!`)
      );

  });

});

2. Join the same room from several browser tabs. We should see the chat box update with a new message about the player who has just joined every time a new socket connects to the server.



## Task 8: Display the game information with `io.in.emit`



The “Game Info” section displays the player’s current room and the players who are active in that room.

1. We can use the `io.in.emit` function to send an event, `room`, to all players in the room by adding the highlighted code in the `src/index.js` file:

Next, use `socket.broadcast.to` to send a `message` event to let all other players in the room know when a new player has joined the game.

# Task 7: Let players know a new player has joined with `socket.broadcast.to`
Next, we’ll use `socket.broadcast.to` to send a `message` event to let all other players in the room know when a new player has joined the game

1. Add the highlighted code in the `src/index.js` file:



# Task 8: Display the game information with `io.in.emit`



The “Game Info” section displays the player’s current room and the players who are active in that room.

1. We can use the `io.in.emit` function to send an event, `room`, to all players in the room by adding the highlighted code in the `src/index.js` file:

Learn how to broadcast messages and the current information of an ongoing game.

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

Display Game Information

Task 7: Let players know a new player has joined with `socket.broadcast.to`

Task 8:

Display Game Information

Task 7: Let players know a new player has joined with socket.broadcast.to

Task 8:

Task 7: Let players know a new player has joined with `socket.broadcast.to`