Touchs not working on my PC

Touchs not working on my PC. I open touch demo from documentation in browser. It also isn’t working.

Does your Pc have a touch screen?

You must give technical details about your hardware.
Without more informations in few days I’ll close the topic.

He have touchpad. Mouse emulate touches, doesn’t she?

If you mean this demo
then it works if you use the browser in mobile mode.
developer settings → test screen size
or similar