A place to play with graphing / charting libraries ... especially d3 ... https://rob-robinson.github.io/d3.fantasticcoding.com/app/
git clone https://github.com/rob-robinson/d3.fantasticcoding.com.git
cd d3.fantasticcoding.com
npm install
npm start
rob-robinson/d3.fantasticcoding.com
playing with D3.js, and angular ... very crude ... proof of concept...
JavaScript