Скачать или смотреть Resolving Missing Material Dependencies After Angular 9 Upgrade

Learn how to fix the issue of missing material dependencies after upgrading to Angular 9. Follow our step-by-step guide to restore functionality in your Angular projects.
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Fixing Missing Material Dependencies After Upgrading to Angular 9

Upgrading packages in your Angular application is usually a seamless task, but sometimes it can lead to frustrating issues. One commonly reported problem occurs after updating to Angular 9, particularly when using Angular Material. Developers have found themselves facing an error indicating missing material dependencies, which can halt development and deployment. If you're encountering such an issue, this guide will guide you through the troubleshooting process to get your application back on track.

The Problem

After following the Angular upgrade guide to migrate from version 8.2 to 9.1, you might receive an error that looks something like this:

[[See Video to Reveal this Text or Code Snippet]]

The errors suggest that the necessary dependencies for Angular Material are not correctly installed, which can stem from various reasons such as incorrect versions or installation issues. You're not alone in facing this; many developers encounter this stumbling block. But worry not—there are clear steps to resolve this.

Solution Overview

Below are the steps you can follow to resolve the issue of missing material dependencies after your Angular upgrade. This method has been tried and tested, so you can rest assured it will help restore your application’s functionality.

Step-by-Step Guide

Delete node_modules Folder:

Navigate to your project directory and remove the node_modules folder. This folder contains all the installed packages and dependencies. Deleting it will give you a fresh start.

Delete package-lock.json File:

This file locks the versions of the packages installed in your project. Deleting it ensures that you're not facing version conflicts when you reinstall your packages.

Clear NPM Cache:

Run the command below to clear cache. This forces npm to fetch fresh versions of packages rather than serving them from the cache:

[[See Video to Reveal this Text or Code Snippet]]

Install Angular Material and CDK:

Now you can install the necessary Angular Material packages and Angular Component Dev Kit (CDK) with the following command:

[[See Video to Reveal this Text or Code Snippet]]

This ensures you have the correct versions needed for your updated Angular core.

Run Your Project:

After completing the above steps, try running your application again. Most likely, the issues with missing material dependencies should be resolved.

Conclusion

In summary, upgrading Angular can sometimes lead to missing dependency issues, but following these straightforward steps can typically clear any hindrances. Make sure to regularly check your package versions and dependencies to maintain a smooth-running application.

If you continue to face any errors or need further assistance, don’t hesitate to reach out to the Angular community or check the official Angular documentation for more insights. Happy coding!