Slate lets you build rich, intuitive editors like those in Medium, Dropbox Paper or Canvas—which are becoming table stakes for applications on the web—without your codebase getting mired in complexity.

It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what is or isn't in "core". You can think of it like a pluggable implementation of contenteditable built on top of React and Immutable. It was inspired by libraries like Draft.js, Prosemirror and Quill.

Slate is currently in beta. It's useable now, but you might need to pull request a fix or two for advanced use cases.