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.

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Table of Contents (8 chapters)
Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
Building a ToDo List
Building a ToDo List
System requirements
ToDo List app
Setting up our development environment with Node and Babel
Summary
2
Building a Meme Creator
Building a Meme Creator
Initial project setup
Webpack module bundler
Building the Meme Creator
Summary
3
Event Registration App
Event Registration App
Event - JS meetup
Initial project setup
Validating and submitting the form using JavaScript
Adding charts to the website using Chart.js
Adding Google Maps to the web page
Generating a production build
Summary
4
Real-Time Video Call App with WebRTC
Real-Time Video Call App with WebRTC
Introduction to WebRTC
Building the Video Call application
Initial project setup
Adding styles to the page
Building the Video Call app
Summary
5
Developing a Weather Widget
Developing a Weather Widget
Can you build a Weather Widget?
Introduction to web components
Building the Weather Widget
Summary
6
Building a Blog with React
Building a Blog with React
Why use a framework?
React
The React crash course
Building a blog with React
Summary
7
Redux
Redux
What is Redux?
Implementing Redux in the blog
Summary

Initial project setup

To get started with the project, open up the starter files for Chapter 3 in VSCode. Create a .env file with the values from the .env.example file. Assign the following values to each environment variable:

  • NODE_ENV=dev: Should be set to production when generating a build.
  • SERVER_URL=http://localhost:3000: We will soon have a server running in this URL.
  • GMAP_KEY: We are going to use the Google Maps API in this project. You need to generate your unique API key to use Google Maps. See: https://developers.google.com/maps/documentation/javascript/get-api-key to generate your API key and add the key to this environment variable.

Earlier in Chapter 2, Building a Meme Creator, I mentioned that you cannot access your JavaScript variables inside HTML when the modules are bundled with Webpack. In Chapter 1, Building a ToDo List, we used the HTML attribute to call a...

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