访问firebase数据库中的数据

<script src="https://www.gstatic.com/firebasejs/9.0.2/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.0.2/firebase-database.js"></script>
<script>
  // 初始化Firebase
  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);
</script>

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

// 读取数据
database.ref('path/to/data').once('value')
  .then((snapshot) => {
    const data = snapshot.val();
    // 处理数据
  })
  .catch((error) => {
    console.error(error);
  });

// 写入数据
database.ref('path/to/data').set({ key: 'value' })
  .then(() => {
    // 写入成功
  })
  .catch((error) => {
    console.error(error);
  });