Merge pull request #29133 from christianchown/master

[react-is] Add AsyncMode, ForwardRef and Profiler

types/react-is/index.d.ts

@@ -1,6 +1,7 @@
-// Type definitions for react-is 16.3
+// Type definitions for react-is 16.5
 // Project: https://reactjs.org/
 // Definitions by: Avi Vahl <https://github.com/AviVahl>
+//                 Christian Chown <https://github.com/christianchown>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -10,17 +11,22 @@ import { ReactElement, ReactType } from 'react';
 
 export function typeOf(value: any): symbol | undefined;
 export function isValidElementType(value: any): value is ReactType;
-
+export function isAsyncMode(value: any): value is ReactElement<any>;
 export function isContextConsumer(value: any): value is ReactElement<any>;
 export function isContextProvider(value: any): value is ReactElement<any>;
 export function isElement(value: any): value is ReactElement<any>;
+export function isForwardRef(value: any): value is ReactElement<any>;
 export function isFragment(value: any): value is ReactElement<any>;
+export function isProfiler(value: any): value is ReactElement<any>;
 export function isPortal(value: any): value is ReactElement<any>;
 export function isStrictMode(value: any): value is ReactElement<any>;
 
+export const AsyncMode: symbol;
 export const ContextProvider: symbol;
 export const ContextConsumer: symbol;
 export const Element: symbol;
+export const ForwardRef: symbol;
 export const Fragment: symbol;
 export const Portal: symbol;
+export const Profiler: symbol;
 export const StrictMode: symbol;

types/react-is/react-is-tests.tsx

@@ -72,3 +72,7 @@ ReactIs.typeOf(123) === undefined;
 ReactIs.typeOf({}) === undefined;
 ReactIs.typeOf(null) === undefined;
 ReactIs.typeOf(undefined) === undefined;
+
+// ForwardRef
+const forwardRef = React.forwardRef((props, ref) => <div />);
+ReactIs.isForwardRef(forwardRef); // true