Observer: detect and monitor newly-attached shadowroots #10
Description
Version 0.0.3 introduces partial ShadowRoot support:
- Currently any ShadowRoot already existing will be monitored by the function via nested mutationObserver.
- But attaching a ShadowRoot after the mutationObserver was created is not properly detected and handled.
A test case exists for this but is set to be skipped at the moment. Make sure to use and if necessary fix it.
Code that I thought should work is in place, but the unit test and manual testing indicate it's not quite right. And I'm still confused about how for some reason it looked like a mutation's removedNodes is the key.