Module not found: Can't resolve 'web-vitals' (React)

# Module not found: Can't resolve 'web-vitals' (React)

To solve the error "Module not found: Error: Can't resolve 'web-vitals'", make sure to install the web-vitals package by opening your terminal in your project's root directory and running the command npm install --save-dev web-vitals and restart your development server.

module not found cant resolve web vitals

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

shell

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# 👇️ with NPM
npm install --save-dev web-vitals

# ----------------------------------------------

# 👇️ with YARN
yarn add web-vitals --dev

npm install web vitals

The command will add the web-vitals package to the development dependencies of your project.

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 web-vitals package in your React.js app.

# Delete your node_modules and reinstall your dependencies

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.

If you are on macOS or Linux, issue the following commands in bash or zsh.

shell

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#  for macOS and Linux
rm -rf node_modules
rm -f package-lock.json
rm -f yarn.lock

# 👇️ clean your npm cache
npm cache clean --force

# 👇️ install packages
npm install

If you are on Windows, issue the following commands in CMD.

cmd

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# for Windows
rd /s /q "node_modules"
del package-lock.json
del -f yarn.lock

# 👇️ clean your npm cache
npm cache clean --force

# 👇️ install packages
npm install

Make sure to restart your IDE and dev server if the error persists. VS Code often glitches and a reboot solves things sometimes.

# Verify `web-vitals` is in your `devDependencies` object

If you still get the error, open your package.json file and make sure it contains the web-vitals package in the devDependencies object.

package.json

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{
  // ... rest
  "devDependencies": {
    "web-vitals": "^2.1.4"
  }
}

The web-vitals module should NOT be globally installed or be in your project's dependencies. It should be in the devDependencies object in your package.json file.

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

shell

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npm install

run npm install command

Or install the latest version of the package:

shell

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npm install --save-dev web-vitals@latest

npm install web vitals latest version

If the error persists, follow the instructions in my Module not found: Can't resolve 'X' error in React article.

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Module not found: Can't resolve 'web-vitals' (React)