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

Drawing a rectangle

To test our canvas, let's draw a rectangle in the canvas by typing the following code:

<script type="text/javascript">
  var canvas = document.getElementById("canvasTest"); //called our canvas by id
  var canvasElement = canvas.getContext("2d"); // made our canvas 2D
  canvasElement.fillStyle = "black"; //Filled the canvas black
  canvasElement.fillRect(10, 10, 50, 50); //created a rectangle

In the script, we declared two JavaScript variables. The canvas variable is used to hold the content of our canvas using the canvas ID, which we used in our <canvas></canvas> tags. The canvasElement variable is used to hold the context of the canvas. We assign black to fillstyle so that the rectangle that we want to draw turns black when filled. We used canvasElement.fillRect(x, y, w, h); for the shape of the rectangle. Where x is the distance of the rectangle from the x axis; y is the distance of the rectangle from the y axis; and w and h are the width...