Resolving the ng: command not found Error After Changing Angular Version

Описание: Learn how to troubleshoot and fix the `ng: command not found` error in Angular when you change the Angular version. Get your projects running smoothly again!
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This video is based on the question https://stackoverflow.com/q/76137424/ asked by the user 'Prince Bhati' ( https://stackoverflow.com/u/16791063/ ) and on the answer https://stackoverflow.com/a/76137637/ provided by the user 'Abhishek Garg' ( https://stackoverflow.com/u/8486957/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting Angular Version Errors: Fixing the ng: command not found Issue

Changing Angular versions while working on various projects can sometimes lead to a frustrating experience, especially for newcomers to the framework. Many developers have encountered the perplexing error: ng: command not found. If you've recently switched your Angular version and are now unable to run your projects, don’t worry—you're not alone! In this guide, we’ll delve into this common problem and outline a straightforward solution to get you back on track.

Understanding the Problem

When you change the Angular version, you may unintentionally disrupt the existing configurations or the command-line interface (CLI) setups, resulting in the following error message when you try to start your Angular project:

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In addition to this, another error related to the Node.js module might pop up:

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These problems usually stem from issues with the Angular CLI or mismatches in module versions due to the node environment being altered.

Step-by-Step Solution to Fix ng: command not found Error

Let’s break down the solution into simple steps. You'll need to clear the cache and reinstall the Angular CLI to ensure everything works as expected.

Step 1: Clear the Cache

Sometimes, cached data can cause issues when switching between versions. To clear the cache, open your command line or terminal and execute the following command:

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This command will clean your npm cache, forcing it to refresh the stored packages and metadata, which can help prevent inconsistencies that might cause errors.

Step 2: Reinstall Angular CLI Globally

After clearing the cache, the next step is to reinstall the Angular CLI globally. Use the following command to ensure you have the latest version installed:

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This command will reinstall Angular CLI globally on your system, making the ng command available again. It’s essential to have the CLI available in your system path so that you can execute Angular commands without issues.

Conclusion

You should now be able to run your Angular projects without encountering the ng: command not found error. Managing versions in Angular can be challenging, but by following the above steps, you’ll ensure that your environment is properly set up and ready to go.

If you continue to face any difficulties, consider revisiting the installation of Node.js or verifying that your project dependencies are aligned with the respective Angular version you wish to use. Don’t hesitate to reach out to the community on forums or GitHub; chances are you are not the only one facing this issue. Happy coding!