Diaperless During Nap

Nowadays, Jaevis able to take his 2 hours nap without the diaper on. But I'll make sure that he pees before he sleeps. Actually this started a month ago, cos there's a few times I forgot to put on the diaper for him, and I noticed that he woke up without wetting the bed. So I've decided to let him go diaperless during his nap. So far so good, no accident at all. But at night, I still put it on for him.