How to Force Use Yarn or NPM!

It is quite common to encounter situations where, inadvertently, we end up using a different package manager for a project than the one initially intended. This can be particularly frustrating, especially when the project was set up using a specific version of Yarn, and we mistakenly initiate or utilize another package manager during development. To avoid such confusion and ensure consistency, we can implement the following solution:

Problems it may cause

Using multiple package managers within the same project can cause conflicts in dependencies, leading to compatibility issues and a complex web of conflicting versions. Different package managers may have varying capabilities and features, resulting in inconsistencies in how dependencies are installed, updated, or managed. This can make it challenging to reproduce or debug issues across different development environments. Moreover, team collaboration can be hindered as developers using different package managers struggle to share consistent project configurations, confusing, wastes time, and delays. Overall, using multiple package managers introduces unnecessary complexity, increases the likelihood of dependency conflicts, and hampers collaboration. Establishing a standardized approach to package management is crucial to mitigate these problems.

Solution

Utilizing strict engine rules in Node.js projects proves beneficial when ensuring code consistency and adherence to specific versions of Node.js. By implementing these rules, you guarantee that everyone on your team or within your organization follows the same guidelines and avoids compatibility issues.

Now, let's dive into the process!

1. Create a .npmrc file in the root directory

    // .npmrc file
    engine-strict=true
   

   This option tells the package manager to use the version of the engines we have specified in the package.json file.

2. Inside your package.json file, you should add the engines section if you don’t currently have it.

    "engines": {
        "node": ">=18.12",
        "npm": "please-use-yarn",
        "yarn": ">= 1.22.1"
     }
   

   For this project, I wanted to not use npm for package management.

3. So now, if we run npm i, npm install or any npm command, we will get errors in output and the command won't execute as we have applied a strict engine policy for this project.

4. If you want to restrict the usage of yarn do the changes accordingly.

Conclusion

By adopting a unified package manager approach, these issues can be mitigated, reducing complexity, and dependency conflicts, and fostering smoother collaboration.