I am using a "shake" function from github - and it has a detection that is browser-based javascript.

//feature detect
this.hasDeviceMotion = 'ondevicemotion' in window;

This though yields true even on Chrome on OS X. It feels strange, since I am not willing to shake my monitor on my desktop.

Safari on OS X gives me "false" in return when testing.

I have searched but not been able to find out why Chrome decided to take this path. It bugs me.

Is there a better way to make this detection? Not all "mobile devices" has shake as well.. or does not let the browser have that capability, as it does not seem to work in windows phones.