firebase get subcollection
const subColRef = collection(db, "collection_name", "doc_name", "subcollection_name"); // odd number of path segments to get a CollectionReference // equivalent to: // .collection("collection_name/doc_name/subcollection_name") in v8 // use getDocs() instead of getDoc() to fetch the collection const qSnap = getDocs(subColRef) console.log(qSnap.docs.map(d => ({id: d.id, ...d.data()})))