Async_jsmodule Rpc : sig ... endmodule Http : sig ... endmodule Debug : sig ... endmodule Persistent_connection : sig ... endval sleep : float -> unit Async_kernel.Deferred.tsleep d is a deferred which becomes determined in d seconds.
val yield : unit -> unit Async_kernel.Deferred.tyield () returns a deferred that becomes determined after the current cycle completes.