Javascript Firebase实时数据库赢得';行不通
我跟踪了整个过程 视频教程。这是我看完教程后写的代码Javascript Firebase实时数据库赢得';行不通,javascript,firebase,firebase-realtime-database,Javascript,Firebase,Firebase Realtime Database,我跟踪了整个过程 视频教程。这是我看完教程后写的代码 <h1 id="one"></h1> <script src="https://www.gstatic.com/firebasejs/3.3.0/firebase.js"></script> <script> // Initialize Firebase var config = { apiKey: "AIzaSyCMhmAMbUwmZLQFG9EZLgnbmOJ
<h1 id="one"></h1>
<script src="https://www.gstatic.com/firebasejs/3.3.0/firebase.js"></script>
<script>
// Initialize Firebase
var config = {
apiKey: "AIzaSyCMhmAMbUwmZLQFG9EZLgnbmOJVabdfNvU",
authDomain: "test-24e84.firebaseapp.com",
databaseURL: "https://test-24e84.firebaseio.com",
storageBucket: "test-24e84.appspot.com",
};
firebase.initializeApp(config);
var one = document.getElementsById('one');
var dbref = firebase.database().ref().child('text');
dbref.on('value', snap => one.innerText = snap.val());
</script>
//初始化Firebase
变量配置={
apiKey:“Aizasycmhmmambuwmzlqfg9ezlgnbmojvabdfnvu”,
authDomain:“test-24e84.firebaseapp.com”,
数据库URL:“https://test-24e84.firebaseio.com",
storageBucket:“test-24e84.appspot.com”,
};
firebase.initializeApp(配置);
var one=document.getElementsById('one');
var dbref=firebase.database().ref().child('text');
dbref.on('value',snap=>one.innerText=snap.val());
编写代码后,我在chrome浏览器中执行html文件。然而,我在屏幕上看不到任何文本(只是空白,没有区别)
怎么了?如何使代码运行 失败,因为
document.getElementsById
不是函数;它是document.getElementById