Tsumego solving software in JS

Does anybody know such software? I’m interested in something like GoTools, which is a Java app, but written in JS.

Well… at least Adum (the author of goproblems.com) isn’t aware of any. I guess it’s time to write one. I’ll try to do something with the article “Lambda Depth-first Proof Number Search and its Application to Go” and see whether I can make it work in JS. I’m going to make this lib available on github, so whoever wants to join and has experience in this stuff is welcome.