Nodejs configuration and environment setup

Node.js is a JavaScript runtime based on the Chrome V8 engine, which is known for its event-driven, non-blocking I/O model. Node.js can be used to build high-performance network and web applications, as well as for server-side JavaScript programming. In practical applications, Node.js has become one of the widely used technologies, such as Express, Socket.IO, Webpack, etc.

Before using Node.js, we need to configure and set up the environment. This article will introduce how to set up a Node.js environment on Windows and macOS systems.

Environment requirements

Node.js running environment requirements:

• macOS 10.10 or higher.
• Windows 7 or higher.
• Linux.

Configuring Node.js on Windows

1. Download the Windows version of Node.js installer from the official website (https://nodejs.org).
2. Select "Run as Administrator" in the installer.
3. Follow the prompts to install Node.js.

4. After the installation is complete, execute the following command on the command line (such as CMD or PowerShell):

   node -v

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

5. If you need to use the Node.js package manager npm, you can enter the following command on the command line:

   npm -v

   If the version number of npm is output, it means npm installation success.

Configuring Node.js on macOS

1. Download the macOS version of the Node.js installer from the official website (https://nodejs.org).
2. Double-click the downloaded file and follow the prompts to install Node.js.

3. After the installation is complete, execute the following command in the terminal:

   node -v

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

4. If you need to use the Node.js package manager npm, you can enter the following command in the terminal:

   npm -v

   If the version number of npm is output, it means that npm is installed successfully. .

Configure Node.js environment variables

On Windows or macOS, in order to conveniently use Node.js and npm in the command line, we can add them to the environment in variables.

Configuring environment variables on Windows

1. Right-click "Computer" and select "Properties".
2. Click "Advanced System Settings".
3. Click "Environment Variables".

4. Find "Path" in the system variables, double-click to open or click "Edit", and then enter the following content at the end of the variable value:

   ;C:Program Files
   odejs

   Note: semicolon ";" It is used to separate different paths.

5. Click OK and close all open windows.

6. Open the command line and enter the following command to verify whether Node.js is configured successfully:

   node -v

   If the version number of Node.js is output, it means that Node.js is configured successfully.

Configuring environment variables on macOS

1. Enter the following command in the terminal:

   nano ~/.bash_profile

2. Add the following content to the opened file:

   export PATH="$PATH:/usr/local/bin"

   Note: The path here is the default installation path. If you use other paths, you need to modify them according to the actual situation.

3. Press control X to exit and save changes.

4. Close and reopen the terminal, enter the following command to verify whether Node.js is configured successfully:

   node -v

   If the version number of Node.js is output, it means that Node.js is configured successfully.

Summary

This article introduces how to configure and build a Node.js environment on Windows and macOS systems. Through the introduction and operation of this article, I believe that readers have mastered the basic configuration and use of the Node.js environment. If you encounter problems while practicing Node.js, you can go to the official website of Node.js to get more resources and help, or join the Node.js development community to communicate and share experiences with other developers.

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