Eww

What it does

Build requirements

Building Eww requires Rust and Cargo, plus dynamic libraries including GTK3, Pango, Cairo, and GLib.checked 8 Oct 2026

Built-in system data

Built-in variables expose data including CPU, RAM, disk, battery, network, and time information.checked 8 Oct 2026

Configuration

Widgets, window geometry, behavior, state, and data are configured with Eww’s Yuck language.checked 8 Oct 2026

Display backends

The installation guide provides separate build commands for X11 and Wayland.checked 8 Oct 2026

Dynamic data

Polling variables can repeatedly run shell scripts, while listening variables read a script’s output and update when it produces a new line.checked 8 Oct 2026

Efficiency note

The documentation says dynamically rendering a widget tree with the literal widget is not very efficient and recommends using it only when necessary.checked 8 Oct 2026

Integrations

The documentation gives examples of using xprop to track the focused desktop and playerctl to monitor the currently playing song.checked 8 Oct 2026

Intended users

Eww is for people who want to define and customize their own desktop widgets, such as bars and dashboards, for a window manager.checked 8 Oct 2026

License

The GitHub repository identifies the project as MIT licensed.checked 8 Oct 2026

Notable limit

Window arguments are constant and cannot be updated after a window has opened.checked 8 Oct 2026

Purpose

Eww is a standalone widget system written in Rust for creating custom widgets in any window manager.checked 8 Oct 2026

Styling

Eww uses CSS or SCSS through GTK’s CSS engine, which does not support all web CSS features, including some animations and layout properties.checked 8 Oct 2026

Support and contribution

The project invites contributions through GitHub pull requests and links to a beginner-friendly introductory guide.checked 8 Oct 2026

Window manager independence

Eww lets users create widgets independently of their window manager.checked 8 Oct 2026