[AC Question]

Been reading that it is not wise to charge your phone over night because it damages the battery.

I am using a S7Edge. Does anyone know if it is smart enough to shut off charging once it hits 100%?

If not, can i use tasker to disable charging once it hits 100%?

[belodion]

Opinions vary. When it reaches full charge, charging will stop. The phone will then use charge doing standby and background stuff, until the charging starts again to top it up. This repeats.

Can you link the source stating that such charging is harmful?

[mru007]

I would not recommend to charge your phone overnight (though it does not practically harm your device):
But the internal heat which is generated when a phone is plugged in, may degrade the battery life slowly over time.

Should Your Phone be Plugged in Overnight? | Digital Trends

Moreover, since you have a S7 Edge (and 'fast charge' feature), you need only max. 1 hour of charging till 80% (this is the sweet spot for Li-ion / Li-po batteries, as per above post & yes, it's true).
Charging a phone overnight is really not required in today's fast paced & "fast charging" world