EWW current window name example.

eww.yuck

(deflisten node_events "./loop.zsh")

(defwindow test :geometry
  (geometry :anchor "center" :width "500px" :height "50px")
  (window-test))

(defwidget window-test [] (box :orientation "v" (label :text node_events)))

;; vim:ft=yuck

loop.zsh

#!/usr/bin/env zsh

function window_name() {
  local old="$(xdotool getwindowfocus getwindowname)"
  print "$old"
  while sleep 0.5; do
    local new="$(xdotool getwindowfocus getwindowname)"
    [ ! $old = $new ] && old="$new" && print "$old"
  done
}

window_name

# vim:filetype=zsh