npm install nodejs

With the popularity of Node.js, npm has become an indispensable tool in front-end development, so when installing Node.js, you also need to install npm.

What is npm?

npm is the package manager for Node.js, which can be used to install, publish, share and manage Node.js modules. npm downloads modules from nmpjs.com by default and installs them into the local node_modules directory.

npm installation method

1. Node.js installation package comes with npm

When installing Node.js, npm will be installed automatically. After installation After Node.js, you can enter the following command on the command line to check the npm version number:

npm -v

2. Use nvm to install Node.js and npm

If you need to do it at the same time If you have multiple versions of Node.js installed and need to switch between different versions, you can use Node Version Manager (nvm). To install nvm, you can download it from the official website or use the following command to install it:

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.38.0/install.sh | bash

After the installation is complete, you can use the following command to install the specified version of Node.js:

nvm install <version>

After installing Node. js, you can install npm through the following command:

npm install npm@latest -g

This command will install the latest version of npm.

3. Install npm using the package manager

Under Linux or macOS, you can use the package manager to install Node.js and npm. Under Ubuntu or Debian, you can use the following command to install:

sudo apt install nodejs
sudo apt install npm

Under MacOS, you can use the following command to install:

brew install node

Under Windows, you can download the installation package from the official website for installation.

How to use npm

1. Installing modules

It is very simple to install modules using npm, just use the following command in the command line:

npm install <module name>

If you need to install the module globally, you can use the following command:

npm install -g <module name>

When installing the module, npm will also look for the module's dependencies and automatically install them in the node_modules directory.

2. Delete module

If you need to delete an installed module, you can use the following command:

npm uninstall <module name>

If you need to delete a globally installed module, you can use The following command:

npm uninstall -g <module name>

3. Update module

If you need to update installed modules, you can use the following command:

npm update <module name>

If you need to update all installed modules Module, you can use the following command:

npm update

4. Publish module

If you have written a Node.js module yourself and want to publish it to npm for others to use, You can use the following command:

npm publish

npm will upload your module to npmjs.com and create a new version number.

Summary

The use of npm is very simple, and there are few commonly used commands, but it is very important for the development and management of Node.js. Proficient in npm commands can allow us to develop Node.js applications more efficiently.

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