如何使用JavaScript从Firebase时间戳中仅检索月份

<script src="https://www.gstatic.com/firebasejs/9.4.0/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.4.0/firebase-database.js"></script>
<script>
  // 初始化Firebase项目
  const firebaseConfig = {
    // 你的Firebase配置信息
  };

  firebase.initializeApp(firebaseConfig);
</script>

{
  "data": {
    "timestamp1": {
      "timestamp": 1636675200000,  // 时间戳数据
      "otherData": "其他数据"
    },
    "timestamp2": {
      "timestamp": 1641350400000,
      "otherData": "其他数据"
    },
    ...
  }
}

const database = firebase.database();
const ref = database.ref("data");

ref.once("value", (snapshot) => {
  snapshot.forEach((childSnapshot) => {
    const timestampData = childSnapshot.val().timestamp;
    const date = new Date(timestampData);
    const month = date.getMonth() + 1; // getMonth() 返回的是0-11，所以要加1

    console.log("月份：", month);
  });
});