超过3天，我试图连接我的web应用程序到firestore，并尝试运行我的web应用程序，但我不能。请帮助我解决我的问题，让我的创业更快成长。TypeError: Cannot read properties of undefined (reading 'app')我该如何解决这个问题?
My Flutter (index.html)代码失败。
<!DOCTYPE html>
<html>
<head>
<!--
If you are serving your web app in a path other than the root, change the
href value below to reflect the base path you are serving from.
The path provided below has to start and end with a slash "/" in order for
it to work correctly.
For more details:
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
This is a placeholder for base href that will be replaced by the value of
the `--base-href` argument provided to `flutter build`.
-->
<base href="$FLUTTER_BASE_HREF">
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="A new Flutter project.">
<!-- iOS meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="jaitun_admin">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<title>jaitun_admin</title>
<link rel="manifest" href="manifest.json">
</head>
<body>
<!-- This script installs service_worker.js to provide PWA functionality to
application. For more information, see:
https://developers.google.com/web/fundamentals/primers/service-workers -->
<script src="https://www.gstatic.com/firebasejs/9.0.1/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.0.1/firebase-analytics.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.0.1/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/9.0.1/firebase-auth.js"></script>
<script>
const firebaseConfig = {
apiKey: "AIzaSyDmv2oj8958mbUg07FW316IxOAiOdYhPTg",
authDomain: "jaituncustomaer.firebaseapp.com",
databaseURL: "https://jaituncustomaer-default-rtdb.firebaseio.com",
projectId: "jaituncustomaer",
storageBucket: "jaituncustomaer.appspot.com",
messagingSenderId: "771594380318",
appId: "1:771594380318:web:aa0a3b61483d19dc2bfa0f",
measurementId: "G-B064R6Q9GJ"
};
// Initialize Firebase
const app = initializeApp(firebaseConfig);
const analytics = getAnalytics(app);
</script>
<script>
var serviceWorkerVersion = null;
var scriptLoaded = false;
function loadMainDartJs() {
if (scriptLoaded) {
return;
}
scriptLoaded = true;
var scriptTag = document.createElement('script');
scriptTag.src = 'main.dart.js';
scriptTag.type = 'application/javascript';
document.body.append(scriptTag);
}
if ('serviceWorker' in navigator) {
// Service workers are supported. Use them.
window.addEventListener('load', function () {
// Wait for registration to finish before dropping the <script> tag.
// Otherwise, the browser will load the script multiple times,
// potentially different versions.
var serviceWorkerUrl = 'flutter_service_worker.js?v=' + serviceWorkerVersion;
navigator.serviceWorker.register(serviceWorkerUrl)
.then((reg) => {
function waitForActivation(serviceWorker) {
serviceWorker.addEventListener('statechange', () => {
if (serviceWorker.state == 'activated') {
console.log('Installed new service worker.');
loadMainDartJs();
}
});
}
if (!reg.active && (reg.installing || reg.waiting)) {
// No active web worker and we have installed or are installing
// one for the first time. Simply wait for it to activate.
waitForActivation(reg.installing || reg.waiting);
} else if (!reg.active.scriptURL.endsWith(serviceWorkerVersion)) {
// When the app updates the serviceWorkerVersion changes, so we
// need to ask the service worker to update.
console.log('New service worker available.');
reg.update();
waitForActivation(reg.installing);
} else {
// Existing service worker is still good.
console.log('Loading app from service worker.');
loadMainDartJs();
}
});
// If service worker doesn't succeed in a reasonable amount of time,
// fallback to plaint <script> tag.
setTimeout(() => {
if (!scriptLoaded) {
console.warn(
'Failed to load app from service worker. Falling back to plain <script> tag.',
);
loadMainDartJs();
}
}, 4000);
});
} else {
// Service workers not supported. Just drop the <script> tag.
loadMainDartJs();
}
</script>
</body>
</html>
Sol.1
在firebase init.您想使用什么作为您的公共目录?
使用build/web代替public作为公共目录。
如果它仍然不工作…Sol.2
将index.html中的基本href链接($FLUTTER_BASE_HREF)替换为存储库的位置。<base href="$FLUTTER_BASE_HREF">到<base href="/">或<base href="/your-repository/">
右键单击并查看页面源代码以获得想法。