Add experimental disclaimers to pointer event APIs

Summary: Changelog: [Internal] - Add experimental disclaimers to pointer event APIs

Reviewed By: lunaleaps, p-sun

Differential Revision: D35682318

fbshipit-source-id: e85a37a2eb9568df636352e170bd42a3bb30a2f6

Libraries/Components/View/ViewPropTypes.js

@@ -89,6 +89,7 @@ type MouseEventProps = $ReadOnly<{|
   onMouseLeave?: ?(event: MouseEvent) => void,
 |}>;
 
+// Experimental/Work in Progress Pointer Event Callbacks (not yet ready for use)
 type PointerEventProps = $ReadOnly<{|
   onPointerEnter?: ?(event: PointerEvent) => void,
   onPointerLeave?: ?(event: PointerEvent) => void,

Libraries/NativeComponent/BaseViewConfig.android.js

@@ -50,6 +50,8 @@ const bubblingEventTypes = {
       bubbled: 'onTouchMove',
     },
   },
+
+  // Experimental/Work in Progress Pointer Events (not yet ready for use)
   topPointerCancel: {
     phasedRegistrationNames: {
       captured: 'onPointerCancelCapture',

Libraries/NativeComponent/BaseViewConfig.ios.js

@@ -86,7 +86,7 @@ const bubblingEventTypes = {
     },
   },
 
-  // Pointer Events
+  // Experimental/Work in Progress Pointer Events (not yet ready for use)
   topPointerCancel: {
     phasedRegistrationNames: {
       captured: 'onPointerCancelCapture',

React/Views/RCTViewManager.m

@@ -445,7 +445,7 @@ RCT_CUSTOM_VIEW_PROPERTY(onTouchMove, BOOL, RCTView) {}
 RCT_CUSTOM_VIEW_PROPERTY(onTouchEnd, BOOL, RCTView) {}
 RCT_CUSTOM_VIEW_PROPERTY(onTouchCancel, BOOL, RCTView) {}
 
-// Pointer Events
+// Experimental/WIP Pointer Events (not yet ready for use)
 RCT_EXPORT_VIEW_PROPERTY(onPointerCancel, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onPointerDown, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onPointerMove2, RCTBubblingEventBlock)