How to rule match urgent window?

[dkaszews]

I want to override some settings for urgent windows to make them more visible, e.g. set opacity to 100%. Running xprop on an urgent window (terminal with while true; do echo -e '\a'; done) I only see "urgency hint bit is set". I tried match = "_NET_WM_STATE_DEMANDS_ATTENTION" I see in some tutorials but it did not work. My WM is i3.

[yshui]

urgency bit is part of WM_HINTS. i don't think we have special treatment for it yet. we can probably add that.

[dkaszews]

I think match = "urgent" would be pretty useful. I'd like to assign it a zoom shader with scale = sin(time) to create a pulsing effect.