Initial commitHEADmain

Created from https://vercel.com/new

1 files changed, 25 insertions, 0 deletions

diff --git a/src/components/hooks/useSticky.ts b/src/components/hooks/useSticky.ts
new file mode 100644
index 0000000..ef9fb36
--- /dev/null
+++ b/src/components/hooks/useSticky.ts
@@ -0,0 +1,25 @@
+import { useEffect, useRef, useState } from 'react';
+
+export function useSticky({ enabled = true, threshold = 1 }) {
+  const [isSticky, setIsSticky] = useState(false);
+  const ref = useRef(null);
+
+  useEffect(() => {
+    let observer: IntersectionObserver | undefined;
+    // eslint-disable-next-line no-undef
+    const handler: IntersectionObserverCallback = ([entry]) =>
+      setIsSticky(entry.intersectionRatio < threshold);
+
+    if (enabled && ref.current) {
+      observer = new IntersectionObserver(handler, { threshold: [threshold] });
+      observer.observe(ref.current);
+    }
+    return () => {
+      if (observer) {
+        observer.disconnect();
+      }
+    };
+  }, [ref, enabled, threshold]);
+
+  return { ref, isSticky };
+}