Learn D3.js

Modules (microlibraries)

You don't have to always load the entire D3 library. D3 is a modular library, so if you are only using some D3 features, you can include only the parts that you are using. The minified default bundle is about 240 KB in size, but you may be able to create your chart using as little as 13 KB if you don't need many modules. An animated interactive bar chart, complete with tooltips, transitions, colors, and SVG graphics can be created with less than 24 KB loading just the following two modules:

<script src="https://d3js.org/d3-selection.v1.min.js"></script><script src="https://d3js.org/d3-transition.v1.min.js"></script>

But if you need axes, maps, and other features, you will require more modules and dependencies. In ...