How to use a specific version of NPM?

In using NPM (Node Package Manager), specific projects may require specific versions of NPM to ensure compatibility and functionality. Below are the steps to use specific versions of NPM:

1. Check Current NPM Version: First, verify the current NPM version via the command line to confirm the environment state. Use the command:

   shell
   npm -v

   This will display the installed NPM version.

2. Install NVM (Node Version Manager): To manage and switch between different Node.js versions (which are closely tied to NPM and typically installed alongside Node.js), it is recommended to use NVM. It enables you to install multiple Node.js and NPM versions and switch between them seamlessly. On Unix-like systems, install NVM using:

   bash
   curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh | bash

   For Windows systems, use nvm-windows:

   shell
   https://github.com/coreybutler/nvm-windows

3. Install Specific Node.js Version (and NPM) Using NVM: After installing NVM, you can install any Node.js version. Since NPM is installed with Node.js, this also installs the corresponding NPM version. For example, to install Node.js version 12.18.3, use:

   bash
   nvm install 12.18.3

   The corresponding NPM version will be installed automatically.

4. Switch to Specific Node.js and NPM Version: Once multiple Node.js versions are installed, use NVM to switch to the desired version:

   bash
   nvm use 12.18.3

   Running this command will automatically switch to Node.js version 12.18.3 and its corresponding NPM version.

5. Verify Version: After switching versions, confirm the current NPM version using npm -v to ensure the correct version is active.

Practical Application Scenario

Consider a scenario where I am developing a project that relies on an older Node.js version due to deprecated APIs. To ensure proper functionality, I need to use Node.js version 10.x and its corresponding NPM version. By following the above steps, I can easily switch to this version for development and testing, guaranteeing project compatibility and stability.

Using specific NPM versions helps maintain project stability, particularly in team collaboration and continuous integration/continuous deployment (CI/CD) environments, ensuring all developers and automated systems operate within consistent software versions.