Add Callback{,Option}.voidExplicit

Author: japgolly

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

@@ -188,6 +188,14 @@ final class CallbackOption[A](private val cbfn: () => Option[A]) extends AnyVal
   def void: CallbackOption[Unit] =
     map(_ => ())
 
+  /**
+   * Discard the value produced by this callback.
+   *
+   * This method allows you to be explicit about the type you're discarding (which may change in future).
+   */
+  @inline def voidExplicit[B](implicit ev: A =:= B): Callback =
+    void
+
   def orElse(tryNext: CallbackOption[A]): CallbackOption[A] =
     CallbackOption(get flatMap {
       case a@ Some(_) => CallbackTo pure a

doc/CHANGELOG-0.10.md

@@ -40,6 +40,8 @@
 
 * Add `CallbackOption.{pass,fail}`.
 
+* Add `Callback{,Option}.voidExplicit`.
+
 * Add `React.Children.toArray`.
 
 * Upgrade React to 0.14.1. Adds new attributes: