How to download and install nodejs

Node.js is a JavaScript runtime based on the Chrome V8 engine for building fast, scalable web applications. Installing Node.js allows you to run JavaScript code on your local computer, making it easier to develop and test.

This article will introduce how to download and install Node.js, and how to configure the Node.js environment on different operating systems.

1. Download the Node.js installation package

Before downloading Node.js, you need to know the operating system type and bit number of your local computer. You can check your computer's operating system and bitrate by following these steps:

1. On Windows: Open Control Panel > System and Security > System to check the operating system and bitrate number information.
2. On Mac: Click the  icon in the upper left corner, then click the "About This Mac" option to view operating system and bitmap information.
3. On Linux: Open a terminal and enter the following command to view the operating system and bitrate information:

uname -a

The easiest way to download the Node.js installation package is to visit the official website, It provides many different types of installation packages, such as Windows Installer, Macintosh Installer, Linux Binaries, etc.

2. Install Node.js

1. Windows installation:

After downloading Windows Installer, double-click the downloaded installation package and follow the wizard to install it. . You can choose custom installation options, such as changing the installation directory, etc.

2. Mac installation:

After downloading the Macintosh Installer, double-click the downloaded installation package and follow the wizard to install it.

3. Linux installation:

After downloading the Linux Binaries, extract them to the desired directory. The easiest way is to open a terminal, switch to the directory where you want to install Node.js, and then unzip the installation package.

tar -xzf node-xxx.tar.gz

After you finish unzipping, you need to add the path to the Node.js binary to the $PATH environment variable. There are multiple methods for this step, which can be configured at the user level or system level.

a. Configure at the user level:

echo 'export PATH=$HOME/[安装目录]/bin:$PATH' >> ~/.bashrc
source ~/.bashrc

b. Configure at the system level:

echo 'export PATH=[安装目录]/bin:$PATH' >> /etc/profile
source /etc/profile

3. Configure the Node.js environment

Installation Once completed, you can launch the terminal and enter the following command to verify the installation of Node.js:

node -v

If everything is fine, you will see the output of the Node.js version number. Now that you have successfully installed Node.js, you can start developing with it.

In addition to this, you can also use npm to install Node.js packages and modules to extend the functionality of your Node.js application. npm is the default package manager for Node.js, and its version can be verified by running the following command:

npm -v

If npm has been installed correctly, the version number of npm will be output.

Conclusion

This article introduces the download and installation process of Node.js, and introduces how to configure the Node.js environment on different operating systems. When you complete these steps, you are ready to start developing Node.js applications. Now you are ready to enter the wonderful world of Node.js!

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