nodejs install multi-version version switching

Sometimes you need to run different projects. Inconsistent node versions will cause many problems, especially some plugins corresponding to the latest version are not necessarily compatible with lower versions due to syntax and other reasons.pit.Uninstalling node repeatedly is cumbersome.

Thankfully nvm lets you manage multiple versions of nodejs on your computer.The full name of nvm is node.js version management. As the name suggests, it is a version management tool for nodejs.Through it, you can install and switch between different versions of nodejs.

1. Download

Releases coreybutler/nvm-windows GitHubPull it to the bottom, it is recommended to download nvm-setup.zip.

• nvm-noinstall.zip: Green free installation version, but needs to be configured when using.
• nvm-setup.zip: The installation version, it is recommended to use this.

2. Installation

Some information on the Internet says that you need to uninstall the installed nodejs first. In fact, you don't need to choose the installed version. During the installation process, the installed version will be detected, and you will be prompted whether to manage it. You can choose yes.

Installation is the next step, no screenshots. During the installation process, you need to select the nvm installation directory and the nodejs installation directory. You don't need to change it and keep the default.

3. Installation confirmation

Open cmd, enter the command nvm, and the version number and command parameters are displayed, indicating that the installation is successful.

4. Settings before use

It's best to set up the mirror before use!

It's best to set up the mirror before use!

It's best to set up the mirror before use!

Otherwise npm may be missing when installing nodejs.

Find the installation directory of nvm just now, there is a settings.txt, add the following 2 lines in it, this is to set the Taobao mirror.

node_mirror: https://npm.taobao.org/mirrors/node/
npm_mirror: https://npm.taobao.org/mirrors/npm/

5. Use

In cmd, enter the command nvm list to view the node version on the current computer

According to enthusiastic netizens, if there is a problem with the operation in cmd (it will prompt for permissions, etc.), you can run it as an administrator.

Command reference:

nvm off // disable node.js version management (do not uninstall anything)nvm on // Enable node.js version managementnvm install  // install node.js named version is the version number For example: nvm install 8.12.0nvm uninstall  // The command to uninstall node.js is to uninstall the specified version of nodejs. When the installation fails, uninstall and usenvm ls // show all installed node.js versionsnvm list available // Displays all versions of node.js that can be installednvm use  // switch to using the specified nodejs versionnvm v // show nvm versionnvm install stable // install the latest stable version

6. Install different versions of nodejs

In cmd, enter the command nvm install 16.8.0, 16.8.0 is the version number, fill in the corresponding version number for the version you want to install, and then wait for it to install automatically, saving you worry and effort.

D:hbuilder-workspace>nvm install 16.8.0Downloading node.js version 16.8.0 (64-bit)...CompleteCreating D:Program Files (x86)vm empDownloading npm version 7.21.0... CompleteInstalling npm v7.21.0...Installation complete. If you want to use this version, typenvm use 16.8.0

This is installed, enter the command nvm use 16.8.0 to switch the node version.

7. Uninstall

Run the command nvm uninstall 16.8.0 in cmd, so you can uninstall version 16.8.0

8. There may be problems

The node installation was successful when vnm install was executed, but npm failed when the version was switched. This is because the default image did not download and install npm. After step 4, uninstall the corresponding version and install it again.

There is a directory corresponding to the version of node in the nvm installation directory, you can open it to see if there is npm in it.

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