6 What are Decorators in Angular скачать в хорошем качестве

6 What are Decorators in Angular

Perfect — this is a core Angular interview question and interviewers love short, precise answers here. ________________________________________ ✅ What are Decorators in Angular? (Interview Answer) Decorators in Angular are special functions that add metadata to classes, methods, properties, or parameters, so that Angular knows how to process and use them. In simple words: Decorators tell Angular what a class or member is and how it should behave. ________________________________________ 🗣️ One-line Interview Definition Decorators are TypeScript functions used in Angular to attach metadata to classes and their members so Angular can identify, configure, and use them at runtime. ________________________________________ 🎯 Why Angular Needs Decorators? • To tell Angular: o This class is a component → @Component o This class is a module → @NgModule o This class is a service → @Injectable o This class is a directive → @Directive • To configure: o Selector, template, styles o Providers, imports, declarations o Dependency injection info ________________________________________ ⭐ Common Angular Decorators (Must-Mention in Interview) 🔹 Class Decorators • @Component → Defines a component • @NgModule → Defines a module • @Injectable → Makes a class available for Dependency Injection • @Directive → Defines a directive • @Pipe → Defines a pipe 🔹 Property Decorators • @Input() → Gets data from parent component • @Output() → Sends data to parent component • @ViewChild() / @ContentChild() → Access template elements 🔹 Method / Parameter Decorators • @HostListener() → Listens to DOM events • @HostBinding() → Binds host properties • @Inject() → Tells Angular what dependency to inject ________________________________________ 🧠 Simple Example You Can Say For example, @Component decorator tells Angular that this class is a component and provides metadata like selector and template, which Angular uses to render it. ________________________________________ ⚡ Super Short Interview Answer Decorators in Angular are used to add metadata to classes and class members so Angular can recognize components, modules, services, and configure how they work. ________________________________________ 🔥 One-Line Summary to Remember Without decorators, Angular would not know which class is a component, module, or service. ________________________________________ If you want, I can also give you “Decorator vs Annotation” or “Why Angular uses decorators” as a crisp follow-up answer for interviews 😄