Resolving the no known element Error in Angular Material Components

Описание: Encountering the `no known element` error with Angular Material? This guide walks you through effective solutions to get your Angular components working flawlessly.
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This video is based on the question https://stackoverflow.com/q/73536506/ asked by the user 'Daniel' ( https://stackoverflow.com/u/6719819/ ) and on the answer https://stackoverflow.com/a/73537123/ provided by the user 'Naren Murali' ( https://stackoverflow.com/u/5924562/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Fixing the no known element Error in Angular Material

If you're developing an Angular application and are utilizing Angular Material, you may have encountered an annoying issue: the 'mat-card-title' is not a known element error. This particular error can be perplexing, especially if you're following the documentation but still facing installation problems. In this guide, we will explore the root of the issue and provide you with a systematic approach to resolving it.

Understanding the Problem

In Angular applications, the no known element error typically occurs when Angular doesn’t recognize a component you are trying to use. In this case, it pertains to Angular Material components like mat-card and mat-card-title. Here’s a quick look at what might trigger this error:

The Angular Material module containing the component has not been properly imported.

The component is being used in a lazy-loaded module that doesn't include the necessary imports.

Common Error Message Breakdown

After facing this error, you might see a message similar to the following:

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

Let's delve into how to address this error effectively.

Solutions to the Problem

1. Import the MatCardModule in the Correct Module

If you are utilizing lazy-loaded modules in your Angular application, the import of MatCardModule may need to occur in the module where your component is declared. Here’s how to do this:

Go to the module file where your component is defined.

Ensure you import the MatCardModule from Angular Material.

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

2. Creating a Shared Material Module

If you are using multiple Angular Material components across different lazy-loaded modules, creating a shared module specifically for Material components can make your life easier. Follow these steps:

Create a file named material.module.ts.

Import all the necessary Angular Material modules you plan to use.

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

Then, import this MaterialModule in each of your lazy-loaded modules.

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

Conclusion

By ensuring that you correctly import Angular Material modules, either in individual lazy-loaded modules or through a shared MaterialModule, you can mitigate the no known element error effectively. Always remember to keep your imports organized, especially in larger applications, to streamline development and debugging efforts.

With this guide, you should find it much easier to work with Angular Material components without running into the frustrating no known element error. Happy coding!