All iOS devices ship with a charger. The iPhone XS and XS Max ship with a 5W USB Power Adapter and Lightning to USB Cable for charging your device. The iPhone XS and XS Max also support Qi wireless charging, but wireless chargers are sold separately. You can purchase wireless charger from third party retailers such as amazon.com.
Wireless charging allows you to charge your device without using messy cables. The glass back of the iPhone XS Max allows you to easily set your iPhone down on any Qi wireless charging device to charge your phone. Any Qi wireless supported device should work with the iPhone XS or XS Max.