Hello! I'm a maintainer of Editor.js. Regarding to your questions: - Editor.js doesn't support nested blocks. We keep structure flat and want Tools API to be

Hello! I'm a maintainer of Editor.js. Regarding to your questions: - Editor.js doesn't support nested blocks. We keep structure flat and want Tools API to be as simple as possible for new developers. The target audience of the Editor.js is media and blogs, usually you don't need complex structure there. However, you can implement some complex plugins for your needs, nested lists as example. - We consider development of the editor very serious and understand importance of the test coverage. At the moment we don't have unit neither e2e tests but this is the one of our next steps on the way. Thanks for your feedback!