Add CallbackOption.{pass,fail}

Author: japgolly

core/src/main/scala/japgolly/scalajs/react/CallbackOption.scala

@@ -8,9 +8,16 @@ object CallbackOption {
   def apply[A](cb: CallbackTo[Option[A]]): CallbackOption[A] =
     new CallbackOption(cb.toScalaFn)
 
+  @deprecated("Use CallbackOption.pass instead.", "0.10.1")
   def empty: CallbackOption[Unit] =
+    pass
+
+  def pass: CallbackOption[Unit] =
     CallbackOption(CallbackTo pure someUnit)
 
+  def fail[A]: CallbackOption[A] =
+    CallbackOption(CallbackTo pure None)
+
   def pure[A](a: A): CallbackOption[A] =
     CallbackOption(CallbackTo pure Some(a))
 

doc/CHANGELOG-0.10.md

@@ -38,6 +38,8 @@
   If you're looking for ways to block (eg. turning a `Callback[Future[A]]` into a `Callback[A]`),
   it is not supported by Scala.JS (See [#1996](https://github.com/scala-js/scala-js/issues/1996)).
 
+* Add `CallbackOption.{pass,fail}`.
+
 * Add `React.Children.toArray`.
 
 * Upgrade React to 0.14.1. Adds new attributes: