It's built to understand html elements instead of normal terminal codes. So we can do something like below:
https://ssrangisetti.github.io/jsshell/#cmd=echo%20%3Ca%20href=%22javascript:term.typeAndExecute('cat.js%20docs/help.md%26%23x7c%253Bmd.js')%22/%3Eclick%20here%20for%20docs%3C/a%3E|md.js
or
https://ssrangisetti.github.io/jsshell/#cmd=echo%20%3Cbutton%20onclick='document.getElementById(%22rick-roll%22).style.display=%22block%22'%3Eclick%20here%20for%20a%20surprise%3C/button%3E%3Cimg%20src=%22https://media.tenor.com/SSY2V0RrU3IAAAAd/rick-roll-rick-rolled.gif%22%20id=%22rick-roll%22%20style=%22display:%20none%22%3E|md.js
it's based on https://uni.xkcd.com/ and https://aava.sh/