Book Image

JavaScript Projects for Kids

By : Syed Omar Faruk Towaha
Book Image

JavaScript Projects for Kids

By: Syed Omar Faruk Towaha

Overview of this book

JavaScript is the most widely-used programming language for web development and that's not all! It has evolved over the years and is now being implemented in an array of environments from websites to robotics. Learning JavaScript will help you see the broader picture of web development. This book will take your imagination to new heights by teaching you how to work with JavaScript from scratch. It will introduce you to HTML and CSS to enhance the appearance of your applications. You’ll then use your skills to build on a cool Battleship game! From there, the book will introduce you to jQuery and show you how you can manipulate the DOM. You’ll get to play with some cool stuff using Canvas and will learn how to make use of Canvas to build a game on the lines of Pacman, only a whole lot cooler! Finally, it will show you a few tricks with OOP to make your code clean and will end with a few road maps on areas you can explore further.
Table of Contents (17 chapters)
JavaScript Projects for Kids
About the Author
About the Reviewer

Encapsulation in JavaScript

In OOP, encapsulation is one of the most important concepts that allows an object to group the members of public and private classes under a single name. We use encapsulation to protect our classes against accidental or willful folly. Encapsulation means to enclose something in or as if something is in a capsule.

Now, we will see whether JavaScript supports encapsulation. If it does, we can say that JavaScript is an OOP language. Let's take a look at the following example:

var person = {
  "name" : "Harry Potter",
  "age" : 22,
alert(; = "John";

If we run this on the console. The first alert box will print the following image:

We changed the variable name to John. Therefore, the second alert box will be similar to the following image:

What would happen if we accidently assigned a number to the name variable?

Assigning a number to the name variable is perfectly acceptable. As far as JavaScript is concerned, a variable can...