client — A client can connect to a server and synchronize its document content. It sends client-side modifications (in the form of operations) to the server, and receives updated content (in the form of operations) from the server after any client submits an update.

controller — Receives UI-level event updates from the frontend and converts it into operations on the client document.

cursor — All positions in which a Text or Group element can be inserted into a document can be represented by a cursor object.

frontend — The editor UI. The current document is rendered as a component inside the frontend, and interactions with this component are forwarded to the controller. The frontend also manages the toolbar, notifications, and dialog boxes.

server — Serves HTTP content, a GraphQL endpoint for performing page-level commands, and a WebSocket endpoint for synchronizing document content.