fp.js is a tiny library to help keep d3.js dom manipulation code clean. Update (December 29, 2013) # Upgraded to support the format at the bottom. Check out this rewrite of the d3.js Grouped Bar Chart Example using fp.js. I write a lot of d3.js code and most dom manipulation code got complicated and hard to maintain. With fp.js attributes, styles and events can be set easily. But the most importan