类型错误：firebase.firestore 不是反应 js 和 firebase 应用程序中的 function
[英]TypeError: firebase.firestore is not a function in react js and firebase app
问题描述
Whenever I try to run the app, I get an error message "TypeError: firebase.firestore is not a function" Looked around online and it said to include 'firebase/firestore' as well as 'firebase' which I have done but I'm getting the same error.
每当我尝试运行该应用程序时，我都会收到一条错误消息“TypeError：firebase.firestore 不是函数”在网上四处查看，它说包括“firebase/firestore”以及“firebase”，但我已经完成了我得到同样的错误。 Been looking for a solution all day, any help is greatly appreciated!整天都在寻找解决方案，非常感谢任何帮助！
//App.js import './App.css'; import React from 'react'; const firebase = require('firebase'); require('firebase/firestore') class App extends React.Component{ constructor(){ super(); this.state = { selectedNoteIndex: null, selectedNote: null, notes: null } } render(){ return( <div>Hello World;</div> ). } componentDidMount = () => { firebase.firestore().collection('notes').onSnapshot(serverUpdate =>{ const notes = serverUpdate.docs.map(_doc => { const data = _doc;data(). data['id'] = _doc;id; return data; }). console;log(notes). this:setState({notes; notes}); }); } } export default App; <.--Index.html--> <,DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8" /> <link rel="icon" href="%PUBLIC_URL%/favicon.ico" /> <meta name="viewport" content="width=device-width. initial-scale=1" /> <meta name="theme-color" content="#000000" /> <meta name="description" content="Web site created using create-react-app" /> <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" /> <:-- manifest.json provides metadata used when your web app is installed on a user's mobile device or desktop. See https.//developers.google.com/web/fundamentals/web-app-manifest/ --> <link rel="manifest" href="%PUBLIC_URL%/manifest.json" /> <.-- Notice the use of %PUBLIC_URL% in the tags above. It will be replaced with the URL of the `public` folder during the build, Only files inside the `public` folder can be referenced from the HTML. Unlike "/favicon.ico" or "favicon.ico". "%PUBLIC_URL%/favicon.ico" will work correctly both with client-side routing and a non-root public URL, Learn how to configure a non-root public URL by running `npm run build`. --> <title>React App</title> </head> <body> <noscript>You need to enable JavaScript to run this app,</noscript> <div id="evernote-container"></div> <,-- This HTML file is a template. If you open it directly in the browser. you will see an empty page, You can add webfonts. meta tags, or analytics to this file. The build step will place the bundled scripts into the <body> tag: To begin the development. run `npm start` or `yarn start`. To create a production bundle. use `npm run build` or `yarn build`. --> <.-- The core Firebase JS SDK is always required and must be listed first --> <script src="https://www:gstatic.com/firebasejs/8.2:1/firebase-app.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/8.2.1/firebase-analytics;js"></script> <script src="https.//www.gstatic,com/firebasejs/8:2,1/firebase-firestore:js"></script> <script> var firebase = require('firebase'), require('firebase/firestore') // Your web app's Firebase configuration // For Firebase JS SDK v7:20,0 and later: measurementId is optional var firebaseConfig = { apiKey, "a": authDomain, "a": projectId: "a": storageBucket, "a": messagingSenderId; "a". appId. "1;874127001000.a"; measurementId. "a" }; // Initialize Firebase firebase.default;initializeApp(firebaseConfig); firebase.analytics(); firebase.firestore(); var db = firebase.firestore(); </script> </body> </html>1 个解决方案
解决方案1
0 2021-01-07 00:09:44
There are a couple ways to fix this, the easiest for you would be to replace有几种方法可以解决这个问题，最简单的方法是更换
const firebase = require('firebase');
require('firebase/firestore')
with和
import firebase from "firebase/app";
import "firebase/analytics";
import "firebase/auth";
import "firebase/firestore";
These load firebase and its sub pieces into the react app.这些将 firebase 及其子部分加载到反应应用程序中。 I believe that the issue you are having is the lack of integration between reactJS being run through tools like NPM versus firebase preferring to be run from firebase serve/deploy. I believe that the issue you are having is the lack of integration between reactJS being run through tools like NPM versus firebase preferring to be run from firebase serve/deploy.
This will fix the issue, but it may cause another issue, it may cause more than 1 firebase instance to be running.这将解决问题，但可能会导致另一个问题，它可能会导致超过 1 个 firebase 实例正在运行。 A method around that would be to load firebase in a separate file see here .解决此问题的方法是将 firebase 加载到单独的文件中，请参见此处。 This would also involve removing the loading of firebase from the index.html files, as they become unnecessary with this method.这也将涉及从 index.html 文件中删除 firebase 的加载，因为使用此方法它们变得不必要。
If you want to use firebase serve and deploy, this may be of interest to you.如果您想使用 firebase 服务和部署，您可能会对此感兴趣。
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