This looks great. We have too many markdown editors now BTW and none of them provide WYSIWYG like Typora. We really need an open source Typora clone.

(HN thread from Nov 2019: https://news.ycombinator.com/item?id=21462832 — I asked for other editors like this and got no other answers AFAICT. So this Mark Text is still the only open-source "WYSIWYG" Markdown editor I'm aware of.)

Edit: The https://github.com/blackhole89/notekit mentioned in a sibling comment is now another.