Try clicking on this box to see impact of a touchstart event (note: support for touch events, especially ones other than touchstart is complex and seems to vary by browser):

TouchEvent outcomes are:
altKey:
changedTouches:
ctrlKey:
metaKey:
shiftKey:
targetTouches:
touches:
number (of touches) in touches:
properties of first touch in touches:
clientX:
clientY:
identifier:
pageX:
pageY:
screenX:
screenY:
target: