A charting library built on Prototype (http://prototypejs.org) and Raphaël (http://raphaeljs.com)
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(A charting library built on Prototype and Raphaël)


Krang wraps around the excellent Raphaël library (a JavaScript vector drawing library using SVG/VML) and handles the ugly details of drawing charts. Supply a dataset, pick a chart type, and you're good to go.

Krang differs from other drawing libraries in a few important ways:

  • Unlike canvas solutions, Krang draws vectors. The individual regions of an SVG/VML graph can respond to events in ways that canvas cannot. Your charts can be interactive.

  • Unlike Flash solutions, Krang draws charts that can be viewed on the iPhone.

  • Unlike g.raphaël and ico, Krang is built upon Prototype, and therefore is architected in a way that will be familiar to users of the library.


Krang is in late-alpha, early-beta stage. It has been used on a couple different public-facing web sites without issue. I don't yet consider it feature-complete, so if there's something you want it to do, please let me know.


The beginnings of PDoc documentation exist in the source files, and I've tried my best to add comments where the code itself is not self-explanatory. Also, look in test/functional for demonstrations of different chart types.


Just like its dependencies — Prototype and Raphaël — Krang carries the MIT License.