Indicates the likely intent of the gesture, or the likely result of the
action if it is not prevented. Note that this cannot be 100% reliable as it
depends on the browser and the target element.
"scroll": Would likely result in a scroll or a pan (for touch events
involving multiple fingers). Results from mouse or trackpad
wheel events, from touch moves involving any number of fingers,
or from directional key presses (Arrows, Home, etc), unless
those actions are deemed to be zoom actions (see below).
"zoom": Would likely result in a zoom. Results from mouse wheel while
holding Ctrl key, from trackpad or touch screen pinch motion or
from pressing +/- on keyboard.
"drag": Would likely result in a drag. Results from pressing the
primary mouse button then moving.
Indicates the likely intent of the gesture, or the likely result of the action if it is not prevented. Note that this cannot be 100% reliable as it depends on the browser and the target element.