Binding object literals as data

With a more complex visualization, each element we have in a data array might not be a primitive integer value or a string, but a JavaScript object itself. In this recipe, we will discuss how this more complex data structure can be leveraged to drive your visualization using D3.

Getting ready

Open your local copy of the following file in your web browser:

https://github.com/NickQiZhu/d3-cookbook-v2/blob/master/src/chapter3/object-as-data.html .

How to do it...

JavaScript object literal is probably the most common data structure you will encounter when you load data sources on the Web. In this recipe, we will take a look at how these JavaScript objects can be leveraged to generate rich visualization. The following code illustrates how to do it:

var data = [ // <- A 
        {width: 10, color: 23},{width: 15, color: 33}, 
        {width: 30, color: 40},{width: 50, color: 60}, 
        {width: 80, color: 22},{width: 65, color: 10}, 
       ...