Solve - Module not found: Can't resolve '@mui/material'

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Borislav Hadzhiev

Last updated: Mar 16, 2022

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Solve - Module not found: Can't resolve '@mui/material' #

To solve the error "Module not found: Error: Can't resolve '@mui/material'", make sure to install the package by opening your terminal in your project's root directory and running the command npm i @mui/material @emotion/react @emotion/styled and restart your development server.

module not found cant resolve mui material

Open your terminal in your project's root directory (where your package.json file is located) and run the following commands:

shell
# 👇️ with NPM npm install @mui/material @emotion/react @emotion/styled --force # 👇️ only if you use @mui/icons-material npm install @mui/icons-material --force # 👇️ only if you use @mui/lab npm install @mui/lab --force # ---------------------------------------------- # 👇️ with YARN yarn add @mui/material @emotion/react @emotion/styled # 👇️ only if you use @mui/icons-material yarn add @mui/icons-material # 👇️ only if you use @mui/lab yarn add @mui/lab

If you get an error while installing the packages, add the --force flag at the end.

The command will add the @mui/material package to the dependencies of your project.

If you use the @mui/icons-material and @mui/lab packages, make sure to install them as well as per the instructions above.

Make sure to restart your development server and your IDE if necessary. Your dev server won't pick up the changes until you stop it and re-run the npm start command.

You should now be able to import and use the @mui/material package in your React.js app.

App.js
import Button from '@mui/material/Button'; function App() { return ( <div> <p> Hello world <Button variant="contained" color="primary"> Click </Button> </p> </div> ); } export default App;

If the error is not resolved, try to delete your node_modules and package-lock.json (not package.json) files, re-run npm install and restart your IDE.

shell
# 👇️ delete node_modules and package-lock.json rm -rf node_modules rm -f package-lock.json # 👇️ clean npm cache npm cache clean --force npm install
Make sure to restart your IDE and dev server if the error still persists. VSCode often glitches and a reboot solves things sometimes.

If you're still getting the "Module not found: Error: Can't resolve '@mui/material'" error, open your package.json file and make sure it contains the @mui/material package in the dependencies object.

package.json
{ // ... rest "dependencies": { "@emotion/react": "^11.8.2", "@emotion/styled": "^11.8.1", "@mui/icons-material": "^5.5.1", "@mui/lab": "^5.0.0-alpha.75", "@mui/material": "^5.5.3", }, }

The @mui/material module should NOT be globally installed or be in your project's devDependencies, it should be in the dependencies object in your package.json file.

You can try to manually add the lines and re-run npm install.

shell
npm install

Or install the latest version of the package:

shell
npm install @mui/material@latest @emotion/react@latest @emotion/styled@latest --force # 👇️ only if you use @mui/icons-material npm install @mui/icons-material@latest --force # 👇️ only if you use @mui/lab npm install @mui/lab@latest --force
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