val zero : bool React.signalval one : bool React.signalval not : bool React.signal -> bool React.signalval (&&) : bool React.signal -> bool React.signal -> bool React.signalval (||) : bool React.signal -> bool React.signal -> bool React.signalval edge : bool React.signal -> bool React.eventval rise : bool React.signal -> unit React.eventval fall : bool React.signal -> unit React.eventval flip : bool -> 'a React.event -> bool React.signal