Describe the bug
Running a simple, valid program in the JS.do example website may lead to a valid script terminating.

Error message is:
`Operation """": no method found, argument in overloaded package WebPerl::JSObject.
exit(255) called, but NO_EXIT_RUNTIME is set, so halting execution but not exiting the runtime or preventing further async execution (build with NO_EXIT_RUNTIME=0, if you

This is for new developers who want to learn / get used to the code architecture of kitsune IDE. Its built on React.

For us to be open source, its important that every logic in the code base is documented. We would like to invite developers to help us get the code documented for kitsune IDE.