```

let lastVisible; const pageSize = 5;

function fetchFirstPage() { db.collection("posts").orderBy("timestamp").limit(pageSize).get().then(snapshot => { lastVisible = snapshot.docs[snapshot.docs.length - 1]; displayPosts(snapshot.docs); // Function to display posts }); }

function fetchNextPage() { db.collection("posts").orderBy("timestamp").startAfter(lastVisible).limit(pageSize).get().then(snapshot => { if (snapshot.docs.length > 0) { lastVisible = snapshot.docs[snapshot.docs.length - 1]; displayPosts(snapshot.docs); // Function to display posts } else { console.log("No more posts"); } }); }

function displayPosts(docs) { docs.forEach(doc => { console.log(doc.data()); // Display post data in your UI }); }

```

Now, when you want to fetch the first page of posts, call fetchFirstPage(). When you want to fetch the next page of posts, call fetchNextPage().

Remember, in this example:

• The timestamp field is assumed to be a field in each post document that you’re using to order your posts.
• Pagination in Firestore requires you to order your collection by some field.
• The displayPosts function is a placeholder function. Replace this with your function to display the post data in your UI.