如何从select表单中获取选项的值并将其提交到firebase

<select id="mySelect">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
  <option value="option3">Option 3</option>
</select>
<button onclick="submitToFirebase()">Submit</button>

function submitToFirebase() {
  var selectElement = document.getElementById("mySelect");
  var selectedValue = selectElement.options[selectElement.selectedIndex].value;

  // 将selectedValue提交到Firebase
  // 代码省略，这里需要使用Firebase的API进行提交操作
}

// 引入Firebase SDK
<script src="https://www.gstatic.com/firebasejs/9.1.3/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.1.3/firebase-database.js"></script>

// 初始化Firebase
var 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);

// 提交选项值到Firebase数据库
function submitToFirebase() {
  var selectElement = document.getElementById("mySelect");
  var selectedValue = selectElement.options[selectElement.selectedIndex].value;

  // 将selectedValue提交到Firebase数据库
  firebase.database().ref("selectedValue").set(selectedValue);
}