Frequently charge iPhone using wireless charger

Can I everyday frequently charge my iphone using wireless charger? Example, my phone battery still have 50%. So i charge it using wireless charger for 30 minutes before I lift the phone to use it for a while. After use it, I put back the phone to charging pad and let it charge another 30 minutes before using it again. Is it harmful to battery & battery life? Can I always put my phone on wireless charging pad although the battery % still high?