[英]ReferenceError: Can't find variable: IDBIndex when using Firebase on Expo
[英]ReferenceError: Can't find variable: firebase global code
我不斷收到錯誤:ReferenceError:
找不到變量: firebase global code@/script.js:10:26 at /script.js:10:26
我正確地初始化了它,但是當我引用變量時它會拋出錯誤。 就初始化變量而言,我的代碼看起來是正確的,但這是我的代碼(我已經包含了我的 html 文件和我的 javascript 文件)。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>repl.it</title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>
<label>User ID:</label><br>
<input type="text" id="userId" /><br>
<label>First Name:</label><br>
<input type="text" id="firstName" /><br>
<label>Last Name:</label><br>
<input type="text" id="lastName" /><br>
<label>Age:</label><br>
<input type="text" id="age" /><br>
<button id="addBtn">ADD</button>
<button id="updateBtn">UPDATE</button>
<button id="readBtn">READ</button><br>
<button id="removeBtn">REMOVE</button>
<body>
<script src="script.js"></script>
</body>
<!-- The core Firebase JS SDK is always required and must be listed first -->
<!-- The core Firebase JS SDK is always required and must be listed first -->
<script src="https://www.gstatic.com/firebasejs/8.0.1/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.0.1/firebase-firestore.js"></script>
<!-- TODO: Add SDKs for Firebase products that you want to use
https://firebase.google.com/docs/web/setup#available-libraries -->
<script src="https://www.gstatic.com/firebasejs/8.0.1/firebase-analytics.js"></script>
<script>
// Your web app's Firebase configuration
// For Firebase JS SDK v7.20.0 and later, measurementId is optional
var firebaseConfig = {
apiKey: "AIzaSyBRhn_MY7TNnTDPbf2WXU-5bio6zpd70UI",
authDomain: "myawesomeproject-69436.firebaseapp.com",
databaseURL: "https://myawesomeproject-69436.firebaseio.com",
projectId: "myawesomeproject-69436",
storageBucket: "myawesomeproject-69436.appspot.com",
messagingSenderId: "299772211749",
appId: "1:299772211749:web:b503b7a4fb44a8676f05cc",
measurementId: "G-6MH270KGNL"
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);
firebase.analytics();
</script>
</html>
const database = firebase.firestore();
const usersCollection = database.collection('users');
addBtn.addEventListener('click', e => {
e.preventDefault();
const ID = usersCollection.doc();
ID.set({
first_name: firstName.value,
last_name: lastName.value,
age: age.value
})
.then(() => {console.log("data written");})
});
script.js 的腳本包含必須發生在firebase SDK 腳本之后,因此它們可以使用全局firebase
變量。 所以,只需將其移動到:
<script src="https://www.gstatic.com/firebasejs/8.0.1/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.0.1/firebase-firestore.js"></script>
<!-- TODO: Add SDKs for Firebase products that you want to use
https://firebase.google.com/docs/web/setup#available-libraries -->
<script src="https://www.gstatic.com/firebasejs/8.0.1/firebase-analytics.js"></script>
<script>
// code that includes firebase.initializeApp()
</script>
<script src="script.js"></script>
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