The current input modality: 'touch' on a touch-first device, or anywhere the last press was a
finger; 'mouse' once a mouse or pen presses on a mouse-first device.
Touch affordances (selection grips, large handles, touch scroll thumbs) key off this rather than
off a static device test, so a laptop with a touchscreen shows them after a tap and hides them
after a click. A touch-first device keeps them even when a mouse is plugged in.
The current input modality:
'touch'on a touch-first device, or anywhere the last press was a finger;'mouse'once a mouse or pen presses on a mouse-first device.