To add on to this, it can in fact be much more complicated than both styles put together and still look correct if done well. If you’re on iOS Safari, try scrol

To add on to this, it can in fact be much more complicated than both styles put together and still look correct if done well. If you’re on iOS Safari, try scrolling to the top and then slowly pulling the page down (the universal iOS Safari gesture for refreshing). It starts out not spinning and each segment fades in to full opacity one by one, creating an impression of the spinner “filling up” as you get closer to completing the gesture. The moment you complete the gesture, the fully solid spinner starts spinning, then the spinning slows while some of the segments start fading, and the fade starts pulsing as well. By the time the spinning has stopped, the pulsing is in full effect. When the action completes, all segments quickly return to full opacity and the spinner quickly begins spinning once again, and then (while spinning) the whole icon both fades and shrinks until it disappears. That is an incredibly complex and incredibly well-executed spinner animation!