Page

def handle_keydown(state, payload):
# The payload is a dictionary containing the key code and modifier keys.
# For example,
# {
#	"key": "ArrowDown",
#	"ctrl_key": False,
#	"shift_key": False,
#	"meta_key": False
# }

key_activated = payload.get("key")
delta = 0
if key_activated == "ArrowLeft":
	delta += -10
elif key_activated == "ArrowRight":
	delta += 10

shift_key = payload.get("shift_key")
if shift_key:
	delta *= 2 # Shift makes it go faster

state["position"] += delta

def handle_page_open(state, payload):
page_key = payload
state["message"] = f"The page {page_key} has been opened."