How to change nodejs to a lower version

nodejs is a running platform based on the Chrome JavaScript engine. It uses event-driven, non-blocking I/O and other features, making it an efficient server-side platform. In actual development, we may encounter situations where we need to switch nodejs versions. This article will introduce how to switch versions in nodejs.

nodejs version management tool nvm

nvm is a git-based nodejs version management tool, similar to rvm in Ruby or jenv in Java. It can easily perform nodejs version switching, installation, uninstallation and other operations.

Install nvm

Before we start using nvm, we need to install nvm on the system. In Linux, you can use the curl command to install, as follows:

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash

In Windows, you can visit the official website of nvm (https://github.com/coreybutler/nvm-windows/releases) and download the nvm-setup.zip file for installation.

Using nvm

After installing nvm, we can take a look at how to use it.

List available nodejs versions: nvm ls-remote

Install the specified version of nodejs: nvm install 8.0.0

Use the specified version of nodejs: nvm use 8.0. 0

Uninstall the specified version of nodejs: nvm uninstall 8.0.0

Set the default version of nodejs: nvm alias default 6.0.0

It should be noted that for Windows systems Said that by default, nvm does not automatically add nodejs to the system environment variables. It needs to be added manually. Two files, add_to_path.cmd and rm_from_path.cmd, can be found in the installation directory of nvm. You can add or add them by executing these scripts. Delete the path of nodejs.

It is very convenient to manage nodejs versions through nvm, and it can also avoid conflicts caused by multiple projects needing to use different versions of nodejs.

Manually switch the nodejs version

The above introduces the use of nvm, but in some cases, we may not want to use nvm to switch versions, but want to manually switch the nodejs version. So how do we perform this operation?

First, you need to download the required version of the nodejs installation package and extract it to the specified directory.

Then, we can achieve manual switching by setting system environment variables. In Linux, you can add the nodejs bin directory to $PATH, such as:

export PATH=$PATH:/path/to/nodejs/bin

In Windows, you need Manually add the path of nodejs to the system environment variable.

When you need to switch the nodejs version, you only need to execute the above set command in the terminal.

Summary

This article introduces two ways to switch versions in nodejs: using nvm for version management and manually switching nodejs versions. For simple development, you can consider manual switching. For projects that need to manage multiple versions at the same time, nvm is a better choice. I hope this article can help you better manage nodejs version in actual development.

The above is the detailed content of How to change nodejs to a lower version. For more information, please follow other related articles on the PHP Chinese website!