zenity/internal/zenutil/osascripts/common.gojs

{{- if .Application}}
  var app = Application({{json .Application}})
{{- else}}
  var app = Application.currentApplication()
{{- end}}

{{- if .WindowIcon}}{
  ObjC.import('Cocoa')
  let nsapp = $.NSApplication.sharedApplication
  let nsimg = $.NSImage.alloc.initWithContentsOfFile({{json .WindowIcon}})
  nsapp.setActivationPolicy($.NSApplicationActivationPolicyRegular)
  nsapp.setApplicationIconImage(nsimg)
}{{- end}}

app.includeStandardAdditions = true
app.activate()