Module not found: Can't resolve 'popper.js' [Solved]

# Module not found: Can't resolve 'popper.js'

To solve the error "Module not found: Error: Can't resolve 'popper.js'", make sure to install the package by opening your terminal in your project's root directory and running the command npm install @popperjs/core and restart your development server.

module not found cant resolve popper js

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 @popperjs/core

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

# 👇️ with YARN
yarn add @popperjs/core

npm install popperjs core

The command will add the @popperjs/core package to the dependencies of your project.

If you prefer to use the CDN scripts instead, refer to the Installation section of the npm page for @popperjs/core.

Popper is used in popular libraries like Bootstrap, Foundation, Material UI, etc.

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.

# 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 `@popperjs/core` is in your `dependencies` object

If you still get the error, open your package.json file and make sure it contains the @popperjs/core package in the dependencies object.

package.json

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{
  // ... rest
  "dependencies": {
    "@popperjs/core": "^2.11.4",
  },
}

The @popperjs/core 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

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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 @popperjs/core@latest

install latest version of popperjs core

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 'popper.js' [Solved]