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

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Borislav Hadzhiev

Wed Mar 16 20222 min read

Fix - 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
# 👇️ with NPM npm install --save-dev web-vitals # ---------------------------------------------- # 👇️ with YARN yarn add web-vitals --dev

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.

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 'web-vitals'" error, open your package.json file and make sure it contains the web-vitals package in the devDependencies object.

package.json
{ // ... 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
npm install

Or install the latest version of the package:

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