如何将Firestore集合存储到一个变量中，然后使用Javascript访问其中的文档？

<script src="https://www.gstatic.com/firebasejs/9.1.3/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.1.3/firebase-firestore.js"></script>

const firebaseConfig = {
  apiKey: "YOUR_API_KEY",
  authDomain: "YOUR_AUTH_DOMAIN",
  projectId: "YOUR_PROJECT_ID",
  storageBucket: "YOUR_STORAGE_BUCKET",
  messagingSenderId: "YOUR_MESSAGING_SENDER_ID",
  appId: "YOUR_APP_ID"
};

firebase.initializeApp(firebaseConfig);

const db = firebase.firestore();
const collectionRef = db.collection('your_collection_name');

collectionRef.get().then((querySnapshot) => {
  querySnapshot.forEach((doc) => {
    // 处理每个文档的数据
    console.log(doc.id, " => ", doc.data());
  });
}).catch((error) => {
  console.log("获取集合数据时出错：", error);
});