I started this because I wanted to build a lightweight web-based and well tested parser for PlantUML. This is to support an other project of mine: A fully web based and interactive visualization for PlantUML.

I am looking for feedback, and maybe more reference projects. This implementation uses PEG.js and its main focus is high test coverage and traceability of changes. I try to achieve this by the use of many fixtures. So even if you don't plan on contributing code, opening an issue with a PlantUML diagram will help :) Thank you.