Highcharts is a charting library written in pure HTML5/JavaScript. Without generating an image we can display a graph using the library. I have a requirement to generate a graph on one of my Drupal projects. In my situation, I have to generate a graph depend on user filtered data. So I choose javascript to generate graphs, it will increase the performance also. Otherw ise, it will increase the server load (if I generate a graph as an image.). Read on to know how to integrate Highcharts in Drupal