Create App.js

src/App.js

@@ -0,0 +1,24 @@
+import React, { useEffect, useState } from 'react';
+import ReactFlow from 'reactflow';
+import 'reactflow/dist/style.css';
+
+function App() {
+  const [elements, setElements] = useState([]);
+
+  useEffect(() => {
+    fetch('/api/data')
+      .then(response => response.json())
+      .then(data => {
+        const { nodes, edges } = data;
+        setElements([...nodes, ...edges]);
+      });
+  }, []);
+
+  return (
+    <div style={{ width: '100vw', height: '100vh' }}>
+      <ReactFlow elements={elements} />
+    </div>
+  );
+}
+
+export default App;