Flow typing for decorator function.

Author: hally9k

package.json

@@ -40,7 +40,9 @@
     "babel-core": "^6.25.0",
     "babel-loader": "^7.1.1",
     "babel-runtime": "^6.23.0",
+    "flow-bin": "^0.57.3",
     "prop-types": "^15.5.10",
+    "react": "^16.0.0",
     "webpack": "^3.3.0"
   },
   "peerDependencies": {

src/ErrorBoundary.js

@@ -16,12 +16,14 @@ type ErrorInfo = {
 type State = {
   error: ?Error,
   info: ?ErrorInfo,
-};
+}
 
-class ErrorBoundary extends Component {
+class ErrorBoundary extends Component<Props, State> {
   props: Props;
   state: State;
 
+  setState: Function
+
   static defaultProps = {
     FallbackComponent: ErrorBoundaryFallbackComponent,
   };
@@ -68,10 +70,10 @@ class ErrorBoundary extends Component {
 
 
 export const withErrorBoundary: Function = (
-    Component: *,
-    FallbackComponent: *,
+    Component: Class<React.Component<*>>,
+    FallbackComponent: Class<React.Component<*>>,
     onError: Function
-): Function => (props: *): * => (
+): Function => props => (
         <ErrorBoundary FallbackComponent={FallbackComponent} onError={onError}>
             <Component {...props} />
         </ErrorBoundary>