How to install and configure nodejs and npm

Node.js is a JavaScript runtime based on the Chrome V8 engine. It is a lightweight concurrent processing, scalable platform that can be used to build web applications, games, tools and other types of applications.

NPM (Node Package Manager) is a package manager for Node.js. It allows users to easily install, update and uninstall packages. NPM provides a very large package library, including more than 800,000 packages, which can be freely used and distributed.

To install Node.js and NPM, you need to cover the following steps:

Step One: Download and Install Node.js

You can download and install Node.js at the official Download the Node.js installation package from the website. Please note that it is recommended that you download the latest version of Node.js. Download the latest version from https://nodejs.org/en/.

Once you download the installer for Node.js, double-click it to start the installation wizard. Just follow the instructions of the installation wizard. In most cases, just install with the default options. During the installation process, you may need to agree to the license agreement, install Node.js into a specific directory, etc.

After completing the Node.js installation, you can verify that the installation was successful by opening a terminal and entering the following command:

node -v

If you see on the terminal Node.js version number, then Node.js has been successfully installed. You can proceed to the next step.

Step 2: Install NPM

During the installation of Node.js, NPM is usually installed automatically. Therefore, you can try to verify that NPM has been installed by running the following command:

npm -v

If you see the NPM version number on the terminal, then NPM has been installed successfully. You can easily use NPM commands on your terminal to install various packages, manage project dependencies, and more.

If you find that NPM is not installed, please first ensure that Node.js is installed correctly and follow the steps below to install NPM:

1. Run the following command in the terminal to update Node.js Package manager:

npm install npm -g

2. Run the following command to verify the version of NPM:

npm -v

If NPM is already installed, this command should print the version number of NPM. If it is not installed, you need to download and install NPM.

Step Three: Verify Installation

After you have completed the installation of Node.js and NPM, you can run some basic commands to verify that they are working properly. Here are some sample commands:

1. Enter "node" in the terminal and press Enter, which will open the REPL (Read-Eval-Print Loop) of Node.js. Here you can enter and execute arbitrary JavaScript code. For example, you can enter the following code to output a string:

console.log('Hello World');

2. Enter "npm" in the terminal and press the Enter key. Open NPM's help menu. Here you can find a list and description of various NPM commands.

At this point, you have completed the installation and configuration of Node.js and NPM.

Summary

The installation and configuration of Node.js and NPM are very simple. Just follow the process wizard. You can easily build applications and manage packages through Node.js and NPM. Keep learning about new packages and applications to improve your coding abilities.

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