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.

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Table of Contents (17 chapters)
JavaScript Projects for Kids
JavaScript Projects for Kids
Credits
Credits
About the Author
About the Author
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Exploring JavaScript in the Console
Exploring JavaScript in the Console
Installing Google Chrome
Installing Atom
Chrome Developer Tools
Our first program
Why do we use Chrome Developer Tools?
Why do we use Atom as the text editor?
Exercise
Summary
2
Solving Problems Using JavaScript
Solving Problems Using JavaScript
Variables
Comments
Arithmetic operators
More operators and operations
Summary
3
Introducing HTML and CSS
Introducing HTML and CSS
HTML
CSS
JavaScript on an HTML page
Summary
4
Diving a Bit Deeper
Diving a Bit Deeper
JavaScript methods
HTML buttons and form
If statement
Switch-case
Loops
Summary
5
Ahoy! Sailing into Battle
Ahoy! Sailing into Battle
The HTML part
The CSS part
The JavaScript part
The final code
Summary
6
Exploring the Benefits of jQuery
Exploring the Benefits of jQuery
Installing jQuery
Explaining the code
Going deeper
Summary
7
Introducing the Canvas
Introducing the Canvas
Implementing canvas
Adding JavaScript
Drawing a rectangle
Drawing a line
A quick exercise
Drawing a circle
Draw linear gradient
A quick exercise
Let's make a clock!
Summary
8
Building Rat-man!
Building Rat-man!
Game user interface
Adding functionalities to the game
Images for Rat-man!
Adding images to our cats
Draw the canvas
Playing the game
Summary
9
Tidying up Your Code Using OOP
Tidying up Your Code Using OOP
Inheritance in JavaScript
Encapsulation in JavaScript
Dissecting Hangman
Summary
10
Possibilities
Possibilities
JavaScript as your first programming language
All chores can be done by JavaScript
Awesome JavaScript examples
Summary
Index
Index

Chapter 9. Tidying up Your Code Using OOP

In this chapter, we are going to learn about object-oriented programming (OOP) and discuss the code of the famous game, Hangman.

"OOP is a programming paradigm that uses abstraction to create models based on the real world. OOP uses several techniques from previously established paradigms, including modularity, polymorphism, and encapsulation." or "OOP languages typically are identified through their use of classes to create multiple objects that have the same properties and methods."

You probably have assumed that JavaScript is an object-oriented programming language. Yes, you are absolutely correct. Let's see why it is an OOP language. If a computer programming language has the following few features, we call it object oriented:

  • Inheritance

  • Polymorphism

  • Encapsulation

  • Abstraction

Before going any further, let's discuss objects. We create objects in JavaScript in the following manner:

var person = new Object();
person.name = "Harry Potter";
person.age =...
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