This is CKEditor 5.
After more than 2 years of building the next generation editor from scratch and closing over 980 tickets, we created a highly extensible and flexible architecture which consists of an amazing editing framework and editing solutions that will be built on top of it.
CKEditor 5 is under heavy development and this demo is not production-ready software. For example:
It has bugs that we are aware of — and that we will be working on in the next few iterations of the project. Stay tuned for some updates soon!