Data Visualization with D3.js Cookbook

Understanding D3-style JavaScript

D3 is designed and built using functional style JavaScript which might come as to seem unfamiliar or even alien to someone who is more comfortable with the procedural or object-oriented JavaScript styles. This recipe is designed to cover some of the most fundamental concepts in functional JavaScript required to make sense of D3, and furthermore enable you to write your visualization code in D3 style.

Getting ready

Open your local copy of the following file in your web browser: https://github.com/NickQiZhu/d3-cookbook/blob/master/src/chapter1/functional-js.html

How to do it...

Let's dig a little deeper into the good part of JavaScript—the more functional side. Take a look at the following code snippet:

function SimpleWidget(spec) ...