Is there a switch without chattering that turns ON when pressed?

Chattering always occurs with a switch that has mechanical contacts.
Photomicrosensor(photointerrupter), optical sensors, and magnetic proximity sensors are the products that detect without chattering.
D2RV (with built-in reed switch) has the least chattering, but it is a basic switch dedicated to microload.

Since the basic switch has a snap-action mechanism, chattering and bouncing will occur.
It is possible to minimize chattering by increasing the operation speed, but increasing the operation speed increases bouncing.

For more information, see "Switch Basics" Technology/ Switching time.