Book Image

Learning Responsive Data Visualization

By : Christoph Körner
Book Image

Learning Responsive Data Visualization

By: Christoph Körner

Overview of this book

Using D3.js and Responsive Design principles, you will not just be able to implement visualizations that look and feel awesome across all devices and screen resolutions, but you will also boost your productivity and reduce development time by making use of Bootstrap—the most popular framework for developing responsive web applications. This book teaches the basics of scalable vector graphics (SVG), D3.js, and Bootstrap while focusing on Responsive Design as well as mobile-first visualizations; the reader will start by discovering Bootstrap and how it can be used for creating responsive applications, and then implement a basic bar chart in D3.js. You will learn about loading, parsing, and filtering data in JavaScript and then dive into creating a responsive visualization by using Media Queries, responsive interactions for Mobile and Desktop devices, and transitions to bring the visualization to life. In the following chapters, we build a fully responsive interactive map to display geographic data using GeoJSON and set up integration testing with Protractor to test the application across real devices using a mobile API gateway such as AWS Device Farm. You will finish the journey by discovering the caveats of mobile-first applications and learn how to master cross-browser complications.
Table of Contents (16 chapters)
Learning Responsive Data Visualization
About the Author
About the Reviewer

Creating animations with JavaScript

Before discussing animations in JavaScript or D3, we need to make sure what defines an animation. An animation is a timed sequence of transformations on one or multiple elements to create an effect of motion.

Timers and intervals in D3

Animation are timed transitions; therefore, we need to keep track of the time in an animation. If we are dealing with a huge number of elements, we have to manually keep a track of a huge number of timers. Luckily, D3 provides an abstraction for timers and interval function with the d3.timer(tickFn[, delay[, time]]) method. This timer function calls tickFn repeatedly after the relative delay or at an absolute date time until it returns true.

Let's write the previous JavaScript animation example with D3 timers:

<svg width="800" height="600">
<rect x="50" y="60" width="100" height="100"></rect>
var rect ='rect:nth-of-type(1)');

animate(rect, 'x', 50, 650);

function animate...