Eww is a declarative framework for creating custom graphical desktop widgets and status bars on Linux. It functions as a desktop widget toolkit that operates independently of the window manager, allowing users to define interface elements through a dedicated configuration language and style them using a cascading stylesheet system.
The project utilizes a client-server daemon architecture to manage the lifecycle of these components, ensuring that state is maintained across the desktop environment. By leveraging a reactive state binding system, the interface updates automatically in response to system events or external data sources.
The framework provides a comprehensive set of tools for desktop customization, including a socket-based message bus that enables external scripts to trigger updates or state changes. Rendering is handled through a graphical toolkit that draws windows directly onto the desktop surface, supporting both X11 and Wayland environments.
