From fd95437bd068594744ac3a62e40e148656a56328 Mon Sep 17 00:00:00 2001
From: nossbigg <chenggibson@gmail.com>
Date: Sat, 2 Feb 2019 23:57:36 +0800
Subject: [PATCH] Refine Keyboard API Event typings

---
 Libraries/Components/Keyboard/Keyboard.js | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/Libraries/Components/Keyboard/Keyboard.js b/Libraries/Components/Keyboard/Keyboard.js
index 6930a0578fbc12..3a89f8b6101eb6 100644
--- a/Libraries/Components/Keyboard/Keyboard.js
+++ b/Libraries/Components/Keyboard/Keyboard.js
@@ -17,7 +17,7 @@ const KeyboardObserver = require('NativeModules').KeyboardObserver;
 const dismissKeyboard = require('dismissKeyboard');
 const KeyboardEventEmitter = new NativeEventEmitter(KeyboardObserver);
 
-type KeyboardEventName =
+export type KeyboardEventName =
   | 'keyboardWillShow'
   | 'keyboardDidShow'
   | 'keyboardWillHide'
@@ -25,6 +25,13 @@ type KeyboardEventName =
   | 'keyboardWillChangeFrame'
   | 'keyboardDidChangeFrame';
 
+export type KeyboardEventEasing =
+  | 'easeIn'
+  | 'easeInEaseOut'
+  | 'easeOut'
+  | 'linear'
+  | 'keyboard';
+
 type ScreenRect = $ReadOnly<{|
   screenX: number,
   screenY: number,
@@ -33,11 +40,11 @@ type ScreenRect = $ReadOnly<{|
 |}>;
 
 export type KeyboardEvent = $ReadOnly<{|
-  duration?: number,
-  easing?: string,
+  duration: number,
+  easing: KeyboardEventEasing,
   endCoordinates: ScreenRect,
-  startCoordinates?: ScreenRect,
-  isEventFromThisApp?: boolean,
+  startCoordinates: ScreenRect,
+  isEventFromThisApp: boolean,
 |}>;
 
 type KeyboardEventListener = (e: KeyboardEvent) => void;