Detailed explanation of the installation and configuration methods of Node.js

Node.js is a very popular open source server-side JavaScript runtime environment. It is favored by developers for its simplicity, ease of use, efficiency, and scalability. In this article, we will introduce you to the installation and configuration methods of Node.js to help you get started quickly.

Step 1: Download Node.js

First, we need to download the installation file of Node.js. You can find the installation file on the Node.js official website (https://nodejs.org/) and select the corresponding version according to your operating system. In Windows systems, you can download the .msi file, while in Mac OS, you download the .pkg file.

Step 2: Install Node.js

Installing Node.js is very simple, just double-click the downloaded .msi/.pkg file and follow the installation wizard. During the installation process, you can select the corresponding options as needed, such as setting the installation directory of Node.js, etc.

Step 3: Verify the installation of Node.js

After the installation is completed, we need to verify whether Node.js has been installed correctly. Please open a terminal or command line window and enter the following command:

node -v

If you see the version number of Node.js, it means that Node.js is installed successfully.

Step 4: Configure NPM

NPM is the package manager of Node.js. It can help us manage and install JavaScript-related packages, making our development work more efficient. After installing Node.js, NPM has also been automatically installed on our computer. However, we still need to do some basic configuration of NPM.

First, we need to create a global Node.js installation directory. Enter the following command in the terminal or command line window:

mkdir ~/.npm-global

Next, we need to configure NPM to use this global directory. Continue to enter the following command in the terminal or command line window:

npm config set prefix '~/.npm-global'

Finally, add this global directory to the system's PATH, so that we can use the globally installed command in any directory. Enter the following command in the terminal or command line window:

export PATH=~/.npm-global/bin:$PATH

In order to make this configuration persistent, you also need to add the above export command to your system file configuration file, such as bashrc or bash_profile file.

Step 5: Install third-party packages

Now, we have completed the installation and configuration of Node.js and NPM. Next, we can install the third-party packages we need through NPM. Enter the following command in the terminal or command line window, for example, we install the express package:

npm install express

If you want to install the package as a global package, the commands in the package will be available in any directory, you need Add the -g option, for example:

npm install -g express

Summary:

In this article, we introduce the installation and configuration method of Node.js, and explain the role of NPM and how to install Node.js Three-party package. As an efficient, scalable and easy-to-use server-side JavaScript runtime environment, Node.js is being loved by more and more developers. I hope this article can help you quickly master the installation and basic configuration methods of Node.js, so that you can better use Node.js for development work.

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