如何在多个HTML页面中使用相同的firebase数据库？

<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>
  // 替换为你的Firebase配置信息
  var 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"
  };

  // 初始化Firebase
  firebase.initializeApp(firebaseConfig);
</script>

<script>
  // 获取数据库引用
  var database = firebase.database();

  // 读取数据
  database.ref('path/to/data').once('value').then(function(snapshot) {
    var data = snapshot.val();
    // 处理数据
  });

  // 写入数据
  database.ref('path/to/data').set({
    key1: value1,
    key2: value2
  });
</script>