React Readme

Author: rsimon

packages/pdf-annotator-react/README.md

@@ -22,4 +22,33 @@ export const App = () => {
   )
 
 }
-```
+```
+
+## Selection Popup
+
+The `TextAnnotationPopup` from the Recogito Text Annotator package is fully compatible with the PDF annotator.
+
+```jsx
+import { Annotorious } from '@annotorious/react';
+import { PDFAnnotator } from '@recogito/react-pdf-annotator';
+import { TextAnnotationPopup } from '@recogito/react-text-annotator';
+
+export const App = () => {
+
+  return (
+    <Annotorious>
+      <PDFAnnotator 
+        pdfUrl="compressed.tracemonkey-pldi-09.pdf" />
+
+      <TextAnnotationPopup
+          asPortal
+          popup={props => (<div>Hello World</div>)} />
+    </Annotorious>
+  )
+
+}
+```
+
+## Hooks
+
+The PDF annotator supports all Annotorious hooks, exactly [like the text annotator](https://github.com/recogito/text-annotator-js/tree/main/packages/text-annotator-react#hooks).