Is it bad if I charge my iPhone 5s overnight?

Will it make any difference to my battery life? I've had this phone for about 3 months now and I don't charge it overnight.

The only problem with charging over night is over charging however phone companies have gotten better at charging capabilities so when your phone is 100% full it doesn't take as much electricity. In other words it isn't bad to leave it plugged in over night.

Iphones do not have overcharging problems, I always charge mine overnight and have never had an issue.