nodejs installs the specified version

Node.js is a popular server-side JavaScript runtime environment based on event-driven, non-blocking I/O. Although it has many advantages, sometimes we need to use a specific version of Node.js during development. This article explains how to install specific versions of Node.js on Windows, Linux, and macOS platforms.

Before we start installing a specific version of Node.js, we need to understand the version number rules of Node.js. The Node.js version number consists of three numbers in the format x.y.z. Among them, x is the major version number, which represents the major version release of Node.js; y is the minor version number, which represents the addition of new functions; z is the patch version number, which represents bug fixes and upgrades to existing functions of Node.js. We can find download links for all historical versions on the official website.

Next, we will detail how to install specific versions of Node.js on different operating systems.

Windows

Installing a specific version of Node.js on Windows is very simple. We only need to go to the historical version page of the official website, find the corresponding version, and download the binary file of the corresponding operating system.

After the download is completed, double-click to run the .msi installer and follow the prompts to install. After the installation is complete, open a command prompt or PowerShell and run the following command to verify whether the installation is successful:

node -v

This command will output the version number of Node.js. If the output version number is consistent with the installed version number, then Prove that the installation has been successful.

Linux

On Linux, we can use nvm (Node Version Manager) to manage multiple Node.js versions. First, we need to confirm whether nvm has been installed on the system. Execute the following command in the terminal:

nvm

If you are prompted that this command cannot be found, it means nvm is not installed and needs to be installed manually.

The process of installing nvm is as follows:

1. Open the terminal and execute the following command to download nvm from GitHub:

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

2. After the installation is completed, Execute the following command to make nvm take effect:

source ~/.bashrc

Or execute the following command to refresh the environment variables:

source ~/.bash_profile

After that, we can use the following command to install the specified version of Node.js:

nvm install 10.12.0

This will download and install Node.js v10.12.0 on your local machine. If the same version of Node.js is already installed on the current system, this command will not reinstall that version.

We can use the following command to view the Node.js version installed in the current system:

nvm ls

After that, we can use the following command to switch the Node.js version currently used:

nvm use 10.12.0

macOS

On macOS, we can use Homebrew to install a specified version of Node.js. Homebrew is a command-line tool-based package manager that can quickly install open source software packages.

1. First, install Homebrew. Execute the following command in the terminal:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

2. After the installation is completed, we can use the following command to check whether the installation is successful:

brew -v

3. Installation specified version of Node.js. Execute the following command in the terminal:

brew install node@10

This command will download and install Node.js v10 on your local machine. If the same version of Node.js is already installed on the current system, this command will not reinstall that version.

4. Verify whether the installation is successful. Execute the following command in the terminal:

node -v

This command will output the version number of Node.js. If the output version number is consistent with the installed version number, it proves that the installation has been successful.

In general, installing a specific version of Node.js mainly depends on the operating system. On Windows, we can download a specific version of the binary file from the official website for installation; on Linux, we can use nvm to manage multiple versions of Node.js; on macOS, we can use Homebrew to manage and install multiple versions of Node.js. version of Node.js. Either way, installing a specific version of Node.js is relatively simple.

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