This is a UI component built completely in React that is meant to be a full-featured textarea replacement similar to CKEditor, TinyMCE and other rich text "WYSIWYG" editors. It's based on the excellent, open source Draft.js from Facebook which is performant and production-tested. RichTextEditor is the main editor component. It is comprised of the Draft.js <Editor>, some UI components (e.g. toolbar) and some helpful abstractions around getting and setting content with HTML/Markdown.