Book Image

HTML5 Graphing and Data Visualization Cookbook

By : Ben Fhala
Book Image

HTML5 Graphing and Data Visualization Cookbook

By: Ben Fhala

Overview of this book

The HTML5 canvas tag makes creating any plot shape easy, all you have to do then is fill it with exciting visualizations written in JavaScript or using other visualization tools. "HTML5 Graphing and Data Visualization Cookbook" is the perfect break into the world of Canvas, charts, and graphs in HTML5 and JavaScript. In this book we will go through a journey of getting to know the technology by creating and planning data-driven visualizations. This cookbook is organized in a linear, progressive way so it can be read from start to finish, as well as be used as a resource for specific tasks.This book travels through the steps involved in creating a fully interactive and animated visualization in HTML5 and JavaScript. You will start from very simple "hello world"ù samples and quickly dive deeper into the world of graphs and charts in HTML5. Followed by learning how canvas works and carrying out a group of tasks geared at taking what we learned and implementing it in a variety of chart types. With each chapter the content becomes more complex and our creations become more engaging and interactive.Our goal is that by the end of this book you will have a strong foundation; knowing when to create a chart on your own from scratch and when it would be a good idea to depend on other APIs.We finish our book in our last two chapters exploring Google maps and integrating everything we learnt into a full project.
Table of Contents (17 chapters)
HTML5 Graphing and Data Visualization Cookbook
About the Author
About the Reviewer

Moving to an OOP perspective

Our application has been developing with a growing momentum. It's time for us to stop that by changing our chart to be more OOP conducive. In this recipe we will clean up our code some more and convert some of it into objects. We will continue from where we left off in our previous recipe, Stacking graphical layers.

Getting ready

The first step is to get our latest source files: 06.01.layers.optimized.html and 06.01.layers.optimized.js. We will rename them and add our animation logic. Beyond changing the references on our HTML file we will not change anything else in our HTML file but focus our attention into the JavaScript file.

One of the simplest ways of creating objects in JavaScript is by using functions. We can create a function and refer within the function name to this and by doing that we can treat the function as an object (more details in the How it works... section of this recipe).

How to do it...

Let's jump right in and start converting our code to be...