listen

This function registers the given event listener to be called whenever the given event occurs. The returned cancellation function can be called to unregister the event listener so that it is not triggered anymore.

The list of valid event names is:

• resolution
  • For resolution changes with waywall.set_resolution()
• state
  • For updates to the instance's state-output file

Arguments

• event: string
• listener: function

Return values

• cancel: function