Marmelab 的 React Admin 教程不起作用

Question

我正在尝试遵循Marmelab.com的此React-Admin教程：

在以下设置之后：

> npm create-react-app test-admin
> cd test-admin/
> npm install react-admin ra-data-json-server prop-types
> npm start

我尝试运行教程中提到的以下代码：

// in src/App.js
import * as React from "react";
import { Admin } from 'react-admin';
import jsonServerProvider from 'ra-data-json-server';

const dataProvider = jsonServerProvider('https://jsonplaceholder.typicode.com');
const App = () => <Admin dataProvider={dataProvider} />;

export default App;

这没有输出和错误列表，如下所示：

react-dom.development.js:86 Warning: ReactDOM.render is no longer supported in React 18. Use createRoot instead. Until you switch to the new API, your app will behave as if it's running React 17. Learn more: https://reactjs.org/link/switch-to-createroot
printWarning @ react-dom.development.js:86
error @ react-dom.development.js:60
render @ react-dom.development.js:29404
./src/index.js @ index.js:5
options.factory @ react refresh:6
__webpack_require__ @ bootstrap:24
(anonymous) @ startup:7
(anonymous) @ startup:7
react.development.js:1476 Uncaught Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:
1. You might have mismatching versions of React and the renderer (such as React DOM)
2. You might be breaking the Rules of Hooks
3. You might have more than one copy of React in the same app
See https://reactjs.org/link/invalid-hook-call for tips about how to debug and fix this problem.
    at resolveDispatcher (react.development.js:1476:1)
    at useContext (react.development.js:1484:1)
    at CoreAdminContext (CoreAdminContext.js:12:1)
    at renderWithHooks (react-dom.development.js:16141:1)
    at mountIndeterminateComponent (react-dom.development.js:20838:1)
    at beginWork (react-dom.development.js:22342:1)
    at HTMLUnknownElement.callCallback (react-dom.development.js:4157:1)
    at Object.invokeGuardedCallbackDev (react-dom.development.js:4206:1)
    at invokeGuardedCallback (react-dom.development.js:4270:1)
    at beginWork$1 (react-dom.development.js:27243:1)
resolveDispatcher @ react.development.js:1476
useContext @ react.development.js:1484
CoreAdminContext @ CoreAdminContext.js:12
renderWithHooks @ react-dom.development.js:16141
mountIndeterminateComponent @ react-dom.development.js:20838
beginWork @ react-dom.development.js:22342
callCallback @ react-dom.development.js:4157
invokeGuardedCallbackDev @ react-dom.development.js:4206
invokeGuardedCallback @ react-dom.development.js:4270
beginWork$1 @ react-dom.development.js:27243
performUnitOfWork @ react-dom.development.js:26392
workLoopSync @ react-dom.development.js:26303
renderRootSync @ react-dom.development.js:26271
performSyncWorkOnRoot @ react-dom.development.js:25924
flushSyncCallbacks @ react-dom.development.js:11982
flushSync @ react-dom.development.js:26040
legacyCreateRootFromDOMContainer @ react-dom.development.js:29309
legacyRenderSubtreeIntoContainer @ react-dom.development.js:29335
render @ react-dom.development.js:29419
./src/index.js @ index.js:5
options.factory @ react refresh:6
__webpack_require__ @ bootstrap:24
(anonymous) @ startup:7
(anonymous) @ startup:7
react-dom.development.js:18525 The above error occurred in the <CoreAdminContext> component:

    at CoreAdminContext (http://localhost:3000/static/js/bundle.js:92536:28)
    at AdminContext
    at Admin (http://localhost:3000/static/js/bundle.js:102485:25)
    at App

Consider adding an error boundary to your tree to customize error handling behavior.
Visit https://reactjs.org/link/error-boundaries to learn more about error boundaries.
logCapturedError @ react-dom.development.js:18525
update.callback @ react-dom.development.js:18558
callCallback @ react-dom.development.js:13092
commitUpdateQueue @ react-dom.development.js:13113
commitLayoutEffectOnFiber @ react-dom.development.js:23204
commitLayoutMountEffects_complete @ react-dom.development.js:24461
commitLayoutEffects_begin @ react-dom.development.js:24447
commitLayoutEffects @ react-dom.development.js:24385
commitRootImpl @ react-dom.development.js:26651
commitRoot @ react-dom.development.js:26517
performSyncWorkOnRoot @ react-dom.development.js:25956
flushSyncCallbacks @ react-dom.development.js:11982
flushSync @ react-dom.development.js:26040
legacyCreateRootFromDOMContainer @ react-dom.development.js:29309
legacyRenderSubtreeIntoContainer @ react-dom.development.js:29335
render @ react-dom.development.js:29419
./src/index.js @ index.js:5
options.factory @ react refresh:6
__webpack_require__ @ bootstrap:24
(anonymous) @ startup:7
(anonymous) @ startup:7
react.development.js:1476 Uncaught Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:
1. You might have mismatching versions of React and the renderer (such as React DOM)
2. You might be breaking the Rules of Hooks
3. You might have more than one copy of React in the same app
See https://reactjs.org/link/invalid-hook-call for tips about how to debug and fix this problem.
    at resolveDispatcher (react.development.js:1476:1)
    at useContext (react.development.js:1484:1)
    at CoreAdminContext (CoreAdminContext.js:12:1)
    at renderWithHooks (react-dom.development.js:16141:1)
    at mountIndeterminateComponent (react-dom.development.js:20838:1)
    at beginWork (react-dom.development.js:22342:1)
    at beginWork$1 (react-dom.development.js:27219:1)
    at performUnitOfWork (react-dom.development.js:26392:1)
    at workLoopSync (react-dom.development.js:26303:1)
    at renderRootSync (react-dom.development.js:26271:1)
resolveDispatcher @ react.development.js:1476
useContext @ react.development.js:1484
CoreAdminContext @ CoreAdminContext.js:12
renderWithHooks @ react-dom.development.js:16141
mountIndeterminateComponent @ react-dom.development.js:20838
beginWork @ react-dom.development.js:22342
beginWork$1 @ react-dom.development.js:27219
performUnitOfWork @ react-dom.development.js:26392
workLoopSync @ react-dom.development.js:26303
renderRootSync @ react-dom.development.js:26271
performSyncWorkOnRoot @ react-dom.development.js:25924
flushSyncCallbacks @ react-dom.development.js:11982
flushSync @ react-dom.development.js:26040
legacyCreateRootFromDOMContainer @ react-dom.development.js:29309
legacyRenderSubtreeIntoContainer @ react-dom.development.js:29335
render @ react-dom.development.js:29419
./src/index.js @ index.js:5
options.factory @ react refresh:6
__webpack_require__ @ bootstrap:24
(anonymous) @ startup:7
(anonymous) @ startup:7

我确定我会关注教程正确。

1. 这与矛盾的版本有关吗？
2. 如何解决此问题并继续进行教程？

我的React版本：

$ npm view react version
18.0.0

Answer 1

React 18 不再支持 ReactDOM.render，因为他们已将其替换为 createRoot。

您可以在这里了解更多信息： React v18.0

您只需降级到 React 17 即可继续学习本教程：

npm install --save [email protected] [email protected]

Answer 2

您必须更改index.js文件。

import ReactDom from 'react-dom/client'
const root = ReactDOM.creatorRoot(document.getElementById('root'));
root.render(<App/>);