Parkinsonâs Disease (PD) is a chronic, progressive disorder that affects nerve cells deep in the brain responsible for planning and controlling body movement. Dopamine is a chemical used in body movement.
Chart.js is a JavaScript library that allows you to draw different types of charts by using the HTML5 canvas element. Since it uses canvas, you have to include a polyfill to support older browsers. The one suggested by the author is ExplorerCanvas, so you may want to stick with it.
Data visualization and charting is a common requirement for web applications. D3.js is the defacto standard when it comes to any data manipulation and visualization. It is one of the most popular projects on GitHub and is used by hundreds of organizations.