👌 IMPROVE: add use client directive to support Next.js apps

Author: AntoineBourin

demo-app/package-lock.json

@@ -15,12 +15,12 @@
     "react-dom": "^17.0.2",
     "react-router-dom": "^6.0.2",
     "react-scripts": "4.0.3",
-    "react-ui-scrollspy": "file:react-ui-scrollspy-2.2.0.tgz",
+    "react-ui-scrollspy": "file:react-ui-scrollspy-2.3.1.tgz",
     "typescript": "^4.4.4",
     "web-vitals": "^1.1.2"
   },
   "scripts": {
-    "start": "PORT=3001 react-scripts start",
+    "start": "PORT=3002 react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",
     "eject": "react-scripts eject",