how to download a npm package as dev dependencies code example

Example 1: npm dev dependencies

# install as devDependency
npm install <package-name> --save-dev

# install as normal dependency
npm install <package-name> --save

# install all devDependencies listed in package.json
npm install --only=dev

# install all normal dependencies listed in package.json
npm install --only=prod
# or if NODE_ENV is set to production
npm install

Example 2: npm install dev dependencies

npm install <package-name> --save-dev

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