doc: Update README.md #263

Author: jaywcjlove

README.md

@@ -367,16 +367,18 @@ module.exports = removeImports({});
 import "@uiw/react-md-editor/markdown-editor.css";
 import "@uiw/react-markdown-preview/markdown.css";
 import dynamic from "next/dynamic";
+import { useState } from "react";
 
 const MDEditor = dynamic(
   () => import("@uiw/react-md-editor").then((mod) => mod.default),
   { ssr: false }
 );
 
 function HomePage() {
+  const [value, setValue] = useState("**Hello world!!!**");
   return (
     <div>
-      <MDEditor value="**Hello world!!!**" />
+      <MDEditor value={value} onChange={setValue} />
     </div>
   );
 }