window-rule that match app-id=(unset) for some tiny popup window

[AClon314]

Hi, @YaLTeR , sorry to interupt you but I want to ask a question :\

1. Try to match the tiny popup window:

window-rule {
    match app-id=null title=null
    open-floating true
}

2. Run vscode in wayland: code --ozone-platform-hint=auto --enable-wayland-ime --wayland-text-input-version=3

3. If set the popup window as floating, then drag and drop tabs is feasible.

before drag:

dragging:

4. Run sleep 1.5; niri msg windows to see this window property:

Window ID 22: (focused)
  Title: ""
  App ID: (unset)
  Is floating: yes
  PID: 2334
  Workspace ID: 1

Is there any window-rule that can match this situation? I've read wiki and tried the window-rule above but ALL windows become floating

[YaLTeR]

Try match title="^$"

[AClon314]

That's work, thanks!

[toftpokk]

Ghostty opens in floating mode with this window rule. Not sure why. Works with alacritty though.

window-rule {
  match title="^$"
  open-floating true
}

$ niri msg windows
# ...
Window ID 120: (focused)
  Title: "~"
  App ID: "com.mitchellh.ghostty"
  Is floating: yes
  PID: 126192
  Workspace ID: 1

$ ghostty --version
Ghostty 1.1.3-arch1

[krovuxdev]

I'm opening the preferences window (or using Ctrl + ,) in Blender, but it doesn't float. What am I missing in my rule?

window-rule {
    match app-id=r#"^blender$"# title=r#"^Preferences"#
    open-floating true
}

[krovuxdev]

firefox (Claude.ai sign) also does not works

window-rule {
    match app-id="firefox" title="Acceso: Cuentas de Google — Mozilla Firefox"
    open-floating true
}