如何在firebase db中获取最新的子密钥？-js

// 引入Firebase SDK
import firebase from 'firebase/app';
import 'firebase/database';

// 初始化Firebase应用
const firebaseConfig = {
  apiKey: "YOUR_API_KEY",
  authDomain: "YOUR_AUTH_DOMAIN",
  databaseURL: "YOUR_DATABASE_URL",
  projectId: "YOUR_PROJECT_ID",
  storageBucket: "YOUR_STORAGE_BUCKET",
  messagingSenderId: "YOUR_MESSAGING_SENDER_ID",
  appId: "YOUR_APP_ID"
};

firebase.initializeApp(firebaseConfig);

// 获取数据库引用
const database = firebase.database();

// 监听特定路径的数据变化
const dataRef = database.ref('your/path/to/data');

dataRef.on('value', (snapshot) => {
  const data = snapshot.val();
  if (data) {
    // 获取最新的子密钥
    const latestKey = Object.keys(data)[0];
    console.log('Latest child key:', latestKey);
  }
}, (error) => {
  console.error('Error reading data:', error);
});