feat: client-io-component.ts barebones functionality

packages/nuxt/src/components/runtime/client-io-component.ts

@@ -0,0 +1,24 @@
+import { defineComponent } from "vue"
+export default defineComponent({
+  setup() {
+    const data = ref(null);
+    const isIntersecting = ref(false);
+    const target = ref(null);
+    let observer: Ref<IntersectionObserver | null> = ref(null)
+    onMounted(() => {
+      const observer = new IntersectionObserver(entries => {
+        entries.forEach(entry => {
+          if (entry.isIntersecting) {
+            isIntersecting.value = true;
+            observer.unobserve(target.value);
+          }
+        });
+      });
+      observer.observe(target.value);
+    });
+
+    return {
+      isIntersecting
+    };
+  }
+});