feat: init

apps/web/core/hooks/use-intersection-observer.ts

@@ -0,0 +1,42 @@
+import type { RefObject } from "react";
+import { useEffect } from "react";
+
+export type UseIntersectionObserverProps = {
+  containerRef: RefObject<HTMLDivElement | null> | undefined;
+  elementRef: HTMLElement | null;
+  callback: () => void;
+  rootMargin?: string;
+};
+
+export const useIntersectionObserver = (
+  containerRef: RefObject<HTMLDivElement | null>,
+  elementRef: HTMLElement | null,
+  callback: (() => void) | undefined,
+  rootMargin?: string
+) => {
+  useEffect(() => {
+    if (elementRef) {
+      const observer = new IntersectionObserver(
+        (entries) => {
+          if (entries[entries.length - 1].isIntersecting) {
+            callback && callback();
+          }
+        },
+        {
+          root: containerRef?.current,
+          rootMargin,
+        }
+      );
+      observer.observe(elementRef);
+      return () => {
+        if (elementRef) {
+          // eslint-disable-next-line react-hooks/exhaustive-deps
+          observer.unobserve(elementRef);
+        }
+      };
+    }
+    // When i am passing callback as a dependency, it is causing infinite loop,
+    // Please make sure you fix this eslint lint disable error with caution
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [rootMargin, callback, elementRef, containerRef.current]);
+};