Package Installation / Uninstallation Commands

• These are commands for installing/uninstalling external module packages.

1. Package Installation #

• Command: npm install <package_name>
• Installs the package into the current project's node_modules folder.
• It is also automatically added to the dependencies section of the package.json file.

  In the past, to add a package to dependencies, you would install it with npm install --save <package_name>. However, since npm@5, this is the default behavior, so --save is no longer necessary.

• Can be abbreviated as npm i <package_name>.
• You can specify the version with npm install <package_name>@<version>.
• You can specify the package installation address with npm install <address>.

2. Installing Multiple Packages #

• Command: npm install <package1> <package2> <package3>...
• Installs multiple packages simultaneously.

3. Global Installation #

• Command: npm install -global 패키지명
• Installs the package in the folder where npm itself is installed, making it accessible from anywhere.

On Mac and Linux, you might need to install it with sudo, like sudo npm i --global <package_name>.

Can be abbreviated as npm i -g 패키지명.

4. Development Installation #

• Command: npm install --save-dev 패키지명
• Installs it so that it's added to the devDependencies section of the package.json file.

Can be abbreviated as npm i -D.

5. Installation Using package.json File #

• Command: npm install
• When you run the command in the folder where the package.json file is saved, it automatically installs all packages listed in the dependencies section.

6. Package Uninstallation #

• Command: npm uninstall 패키지명
• Deletes the package installed in the node_modules folder. It is also removed from the dependencies section of package.json.

Can be abbreviated as npm rm 패키지명.