Importing React for the first example. (#14346)

facebook · Jan 23, 2019 · 3f0bcaf · 3f0bcaf
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commit 3f0bcaf
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diff --git a/packages/react-is/README.md b/packages/react-is/README.md
@@ -17,6 +17,7 @@ npm install react-is
 ### Determining if a Component is Valid
 
 ```js
+import React from "react";
 import * as ReactIs from "react-is";
 
 class ClassComponent extends React.Component {