---
name: "waybar-niri-window"
section: "5"
platform: "linux"
package: "waybar"
version: "0.15.0-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/waybar-niri-window"
---

# waybar-niri-window(5)

niri window module

## NAME

waybar - niri window module

## DESCRIPTION

The **window** module displays the title of the currently focused window in niri.

## CONFIGURATION

Addressed by **niri/window**

**format**: \
 typeof: string \
 default: {title} \
 The format, how information should be displayed. On {} the current window title is displayed.

**rewrite**: \
 typeof: object \
 Rules to rewrite window title. See **rewrite rules**.

**separate-outputs**: \
 typeof: bool \
 Show the active window of the monitor the bar belongs to, instead of the focused window.

**icon**: \
 typeof: bool \
 default: false \
 Option to hide the application icon.

**icon-size**: \
 typeof: integer \
 default: 24 \
 Option to change the size of the application icon.

**expand**: \
 typeof: bool \
 default: false \
 Enables this module to consume all left over space dynamically.

## FORMAT REPLACEMENTS

See the output of "niri msg windows" for examples

**{title}**: The current title of the focused window.

**{app\_id}**: The current app ID of the focused window.

## REWRITE RULES

**rewrite** is an object where keys are regular expressions and values are rewrite rules if the expression matches. Rules may contain references to captures of the expression.

Regular expression and replacement follow ECMA-script rules.

If no expression matches, the title is left unchanged.

Invalid expressions (e.g., mismatched parentheses) are skipped.

## EXAMPLES

```
"niri/window": {
	"format": "{}",
	"rewrite": {
		"(.*) - Mozilla Firefox": "🌎 $1",
		"(.*) - zsh": "> [$1]"
	}
}
```

## STYLE

- •

  **#window**

- •

  **window#waybar.empty #window** When no windows are on the workspace

The following classes are applied to the entire Waybar rather than just the window widget:

- •

  **window#waybar.empty** When no windows are in the workspace

- •

  **window#waybar.solo** When only one window is on the workspace

- •

  **window#waybar.\<app-id\>** Where **app-id** is the app ID of the only window on the workspace