小编Han*_*Han的帖子

当我尝试从 Material UI 导入一些图标时，我可以看到此错误。我按照建议安装了一些模块，但仍然没有修复。

包.json

    "@material-ui/core": "^4.12.3",
    "@mui/icons-material": "^5.0.1",
    "@mui/lab": "^5.0.0-alpha.49",

我尝试使用以下命令安装 /utils，

$ npm install @mui/material/utils

错误：

npm ERR! code ENOLOCAL
npm ERR! Could not install from "@mui\material\utils" as it does not 
contain a package.json file.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Han\AppData\Roaming\npm-cache\_logs\2021-10-03T21_47_03_649Z-debug.log

有什么我错过的吗？

**经过一番研究，我删除了“@material-ui/core”并安装了“@mui/core”。我认为出现此错误是因为名称从material更改为mui？

    "@mui/core": "^5.0.0-alpha.49",
    "@mui/icons-material": "^5.0.1",
    "@mui/lab": "^5.0.0-alpha.49",
    "@mui/utils": "^5.0.1",

谢谢。

当我使用“EmailJS”添加联系表单时出现错误。我可以看到 Package.json 上的依赖关系看起来很好，但它说未定义。

    "react": "^17.0.2",
    "react-dom": "^17.0.2",

我按照建议更改了导入格式，

import React from 'react';
import ReactDOM from 'react-dom';

也重新安装了，但是错误仍然没有解决。

ReferenceError: React is not defined
    at Object.children (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\.next\server\pages\index.js:3460:62)
    at BaseAccordion.render (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\.next\server\pages\index.js:3595:23)
    at processChild (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\react-dom\cjs\react-dom-server.node.development.js:3450:18)
    at resolve (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\react-dom\cjs\react-dom-server.node.development.js:3270:5)
    at ReactDOMServerRenderer.render (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\react-dom\cjs\react-dom-server.node.development.js:3753:22)
    at ReactDOMServerRenderer.read (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\react-dom\cjs\react-dom-server.node.development.js:3690:29)
    at renderToString (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\react-dom\cjs\react-dom-server.node.development.js:4298:27)
    at Object.renderPage (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\next\dist\next-server\server\render.js:54:854)
    at Function.getInitialProps (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\.next\server\pages\_document.js:791:19)
    at Function.getInitialProps (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\.next\server\pages\_document.js:1373:85)
    at loadGetInitialProps (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\next\dist\next-server\lib\utils.js:5:101)
    at renderToHTML (C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\next\dist\next-server\server\render.js:54:1145)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at async C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\next\dist\next-server\server\next-server.js:112:97
    at async C:\Users\Han\Desktop\andamilo\24-shopifystorehelp\node_modules\next\dist\next-server\server\next-server.js:105:142

任何人都可以告诉我这里缺少什么吗？