Handling 'Can't bind to 'ngForIn' since it isn't a known native property' Error in Angular

Summary: Learn how to troubleshoot and fix the Angular error "Can't bind to 'ngForIn' since it isn't a known native property" by understanding its causes and implementing the correct solutions.
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When working with Angular, encountering errors can be a common part of the development process. One such error is "Can't bind to 'ngForIn' since it isn't a known native property." This error can be perplexing, but understanding its cause and solution is key to efficient debugging.

What Causes This Error?

The error message "Can't bind to 'ngForIn' since it isn't a known native property" typically occurs due to a few common issues:

Typographical Error: The directive should be ngFor or *ngFor rather than ngForIn. The incorrect usage of ngForIn leads to this binding error.

Module Import Issues: Angular directives like ngFor are part of the CommonModule. If this module is not imported properly in the respective Angular module, the error can occur.

Structural Directive Syntax: Angular structural directives (such as ngFor) should be used with the * prefix, indicating the use of Angular's structural directive syntax.

How to Resolve the Error

Correct the Directive Usage
Ensure that you are using the correct directive. Replace ngForIn with *ngFor.

Incorrect Usage:

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Correct Usage:

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Import CommonModule in Your Module
If the error persists, ensure that the CommonModule is imported into the Angular module where you are using *ngFor.

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Verify the Structural Directive Syntax
Ensure you are using the structural directive syntax correctly with the asterisk (*) before ngFor.

Correct Syntax:

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Conclusion

By understanding the common causes of the "Can't bind to 'ngForIn' since it isn't a known native property" error and following the outlined steps, you can resolve this issue efficiently. Correcting typographical errors, ensuring proper module imports, and using the correct structural directive syntax are essential for smooth Angular development. Debugging such issues not only helps in resolving the immediate problem but also enhances your overall understanding of Angular's structural directives and module system.