Book Image

JavaScript by Example

By : Dani Akash S
Book Image

JavaScript by Example

By: Dani Akash S

Overview of this book

JavaScript is the programming language that all web developers need to learn. The first item on our JavaScript to-do list is building g a To-do list app, which you'll have done by the end of the first chapter. You'll explore DOM manipulation with JavaScript and work with event listeners. You'll work with images and text to build a Meme creator. You will also learn about ES (ECMAScript) classes, and will be introduced to layouts using the CSS3 Flexbox. You'll also develop a responsive Event Registration form that allows users to register for your upcoming event and use charts and graphics to display registration data. You will then build a weather application, which will show you different ways perform AJAX requests and work with dynamic, external data. WebRTC enables real-time communication in a web browser; you'll learn how to use it when you build a real-time video-call and chat application later in the book. Towards the end of the book, you will meet React, Facebook's JavaScript library for building user interfaces. You'll throw together a blog with React, and get a feel for why this kind of JavaScript framework is used to build large-scale applications. To make your blog more maintainable and scalable, you'll use Redux to manage data across React components.
Table of Contents (8 chapters)

Building the Video Call app

Everything's in place, so let's start coding. As usual, as we did in the previous apps, open your home.js file and create your Home class with a constructor:

class Home {
constructor() {


After that, create an instance of the Home class and assign it to an object, home, as follows:

const home = new Home();

We are going to have a use for the home object later. We now add the SimpleWebRTC package to our project by running the following command in the terminal from our project root folder:

npm install -S simplewebrtc

And add the following import statement to the top of your home.js file:

import SimpleWebRTC from 'simplewebrtc';

As per the SimpleWebRTC documentation, we need to create an instance of the SimpleWebRTC class with some configuration to use it in our application. In your home.js file, before the Home class, add the following...