docs(website): sidebar mobile

website/src/hooks/useMenuHeight.js

@@ -0,0 +1,23 @@
+import { useState, useEffect } from 'react';
+
+const getInnerHeight = () => {
+  return typeof window !== 'undefined' ? window.innerHeight : 0;
+};
+
+export default function useMenuHeight() {
+  const [menuHeight, setMenuHeight] = useState(getInnerHeight());
+
+  useEffect(() => {
+    const onResize = () => {
+      setMenuHeight(getInnerHeight());
+    };
+
+    window.addEventListener('resize', onResize);
+
+    return () => {
+      window.removeEventListener('resize', onResize);
+    };
+  });
+
+  return menuHeight;
+}