获取Firestore文档作为纯Javascript对象？

const firebaseConfig = {
  apiKey: "YOUR_API_KEY",
  authDomain: "YOUR_AUTH_DOMAIN",
  projectId: "YOUR_PROJECT_ID",
  // ...
};

// 初始化Firestore
firebase.initializeApp(firebaseConfig);
const db = firebase.firestore();

const docRef = db.collection("yourCollection").doc("yourDocument");

docRef.get().then((doc) => {
  if (doc.exists) {
    // 将文档数据转换为纯Javascript对象
    const data = doc.data();
    console.log(data);
  } else {
    console.log("文档不存在");
  }
}).catch((error) => {
  console.log("获取文档失败：", error);
});