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Resolving Angular NG2007 Error: In-depth Analysis and Practical Guide for 'Class is using Angular features but is not decorated'
This article provides a comprehensive analysis of the common Angular NG2007 error - 'Class is using Angular features but is not decorated'. Through a practical case study involving multiple sports components (cricket, football, tennis, etc.) sharing common properties, it explains why base classes containing @Input decorators require explicit Angular decorators. Focusing on Angular 9+ as the primary reference, the article presents minimal implementation using @Component decorator and compares alternative approaches like @Injectable and @Directive. It also delves into abstract class design, dependency injection compatibility, and best practices across different Angular versions, offering developers complete technical guidance.