This compares better to Raphael. D3 is a library to present data visually, and Bonsai is a drawing library. You can draw with D3 and you can produce data visua

This compares better to Raphael. D3 is a library to present data visually, and Bonsai is a drawing library. You can draw with D3 and you can produce data visualizations with Bonsai, but they each shine in their own area. Creating a simple bar chart with Bonsai wouldn't be easy, the same thing goes for drawing a star in D3.