Dot notification with Ionic Tabs

Does anyone have a good solution for placing a dot notifier on an ionic tab icon? For example, for a messages tab, I would like to place a colored dot in the corner of the ionicon of that tab when there is a new message. The directive use in ion-tabs has me a little confused about how I could place a pseudo element or something like that. I’ve tried a number of css applications, but can’t seem to get what I’m looking for.