读取未定义的属性（读取“应用程序”）答案

【问题标题】：read properties of undefined (reading 'app')读取未定义的属性（读取“应用程序”）
【发布时间】：2021-11-23 08:18:09
【问题描述】：

An Observatory debugger and profiler on Chrome is available at: http://127.0.0.1:64319/lujnI6UYeBo=
TypeError: Cannot read properties of undefined (reading 'app')
    at Object.app$ [as app] (http://localhost:49682/packages/firebase_core_web/src/interop/core.dart.lib.js:37:101)
    at initializeApp (http://localhost:49682/packages/firebase_core_web/firebase_core_web.dart.lib.js:87:25)
    at initializeApp.next (<anonymous>)
    at runBody (http://localhost:49682/dart_sdk.js:40666:34)
    at Object._async [as async] (http://localhost:49682/dart_sdk.js:40697:7)
    at firebase_core_web.FirebaseCoreWeb.new.initializeApp (http://localhost:49682/packages/firebase_core_web/firebase_core_web.dart.lib.js:80:20)
    at initializeApp (http://localhost:49682/packages/firebase_core/firebase_core.dart.lib.js:106:59)
    at initializeApp.next (<anonymous>)
    at runBody (http://localhost:49682/dart_sdk.js:40666:34)
    at Object._async [as async] (http://localhost:49682/dart_sdk.js:40697:7)
    at Function.initializeApp (http://localhost:49682/packages/firebase_core/firebase_core.dart.lib.js:105:20)
    at new main.MyApp.new (http://localhost:49682/packages/fupro/main.dart.lib.js:152:52)
    at main$ (http://localhost:49682/packages/fupro/main.dart.lib.js:169:20)
    at main (http://localhost:49682/web_entrypoint.dart.lib.js:39:29)
    at main.next (<anonymous>)
    at http://localhost:49682/dart_sdk.js:40646:33
    at _RootZone.runUnary (http://localhost:49682/dart_sdk.js:40503:58)
    at _FutureListener.thenAwait.handleValue (http://localhost:49682/dart_sdk.js:35432:29)
    at handleValueCallback (http://localhost:49682/dart_sdk.js:36017:49)
    at Function._propagateToListeners (http://localhost:49682/dart_sdk.js:36055:17)
    at _Future.new.[_completeWithValue] (http://localhost:49682/dart_sdk.js:35897:23)
    at http://localhost:49682/dart_sdk.js:35083:46
    at _RootZone.runUnary (http://localhost:49682/dart_sdk.js:40503:58)
    at _FutureListener.then.handleValue (http://localhost:49682/dart_sdk.js:35432:29)
    at handleValueCallback (http://localhost:49682/dart_sdk.js:36017:49)
    at Function._propagateToListeners (http://localhost:49682/dart_sdk.js:36055:17)
    at _Future.new.[_completeWithValue] (http://localhost:49682/dart_sdk.js:35897:23)
    at async._AsyncCallbackEntry.new.callback (http://localhost:49682/dart_sdk.js:35920:35)
    at Object._microtaskLoop (http://localhost:49682/dart_sdk.js:40808:13)
    at _startMicrotaskLoop (http://localhost:49682/dart_sdk.js:40814:13)
    at http://localhost:49682/dart_sdk.js:36279:9
The Flutter DevTools debugger and profiler on Chrome is available at: http://127.0.0.1:9104?uri=http://127.0.0.1:64319/lujnI6UYeBo=

【问题讨论】：

Firebase_core_web 包或初始化 web 的 firebase 应用似乎有问题。
那么解决办法是什么？
您使用的是什么版本的 firebase SDK？复制 index.html 中的firebase src 行
我正在开发非网络应用
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标签： android flutter dart

【解决方案1】：

尝试将 index.html 中的 firebase 脚本行更改为 <script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-app.js"></script>。 Reference

【讨论】：

我正在开发应用程序而不是 web.so 请告诉我与应用程序相关的解决方案
您在 chrome 中运行您的应用程序？