Decorators & Metadata

88 lessons in TypeScript

• Typing Decorators with GenericsSlides / Video
• Decorators in Dependency InjectionSlides / Video
• addInitializer and Auto-AccessorsSlides / Video
• TC39 Stage 3 Decorator SignatureSlides / Video
• Custom Metadata with defineMetadata and getMetadataSlides / Video
• Design-Time Type Metadata KeysSlides / Video
• reflect-metadata and Reflect.metadataSlides / Video
• Parameter Decorators in TypeScriptSlides / Video
• Property Decorators in TypeScriptSlides / Video
• Accessor Decorators for Getters and SettersSlides / Video
• Method Decorators and PropertyDescriptorSlides / Video
• Class Decorators: Legacy SignatureSlides / Video
• Decorator Evaluation and Application OrderSlides / Video
• Enabling Decorators with Compiler FlagsSlides / Video
• Two Decorator Systems in TypeScriptSlides / Video
• Class Decorators Replacing the ConstructorSlides / Video
• Composing Multiple DecoratorsSlides / Video
• Decorator Factories in TypeScriptSlides / Video
• Method Decorator Reads Wrong ObjectCode Quiz
• Property Decorator Has No DescriptorCode Quiz
• Factory Runs Before ApplicationCode Quiz
• Decorator Factory Not InvokedCode Quiz
• Class Decorator Argument CountCode Quiz
• Parameter Decorator Third ArgumentCode Quiz
• Accessor Decorator Uses valueCode Quiz
• Stacked Decorators Wrong OrderCode Quiz
• Decorator vs. static Modifier OrderCode Quiz
• addInitializer for Auto-Bound MethodsCode Quiz
• Static Member Decorator TargetCode Quiz
• getMetadata Needs the PrototypeCode Quiz
• Decorators Only Apply to Classes/MembersCode Quiz
• Property Key Can Be a SymbolCode Quiz
• Method Decorator Must Return DescriptorCode Quiz
• Standard Decorator Context Uses nameCode Quiz
• Standard Decorators Have No DescriptorCode Quiz
• Parameter Decorator Return Is IgnoredCode Quiz
• Reading Constructor design:paramtypesCode Quiz
• Enabling Decorator SupportCode Quiz
• Missing Metadata Emission FlagCode Quiz
• Forgotten reflect-metadata PolyfillCode Quiz
• Wrong design:type Key StringCode Quiz
• Wrong design:returntype KeyCode Quiz
• Decorator Forgets to Return ClassCode Quiz
• Replacement Class Must Extend OriginalCode Quiz
• TC39 addInitializer HookQuiz
• TC39 Decorator ContextQuiz
• design:paramtypes MetadataQuiz
• Custom Metadata KeysQuiz
• reflect-metadata LibraryQuiz
• emitDecoratorMetadata FlagQuiz
• Composing Nested DecoratorsQuiz
• Decorator Evaluation vs ApplicationQuiz
• Parameter Decorator ArgumentsQuiz
• Property Decorator ArgumentsQuiz
• Static vs Instance TargetsQuiz
• Method Decorator ArgumentsQuiz
• Class Decorator Return ValueQuiz
• Class Decorator SignatureQuiz
• Legacy vs Stage 3 DecoratorsQuiz
• Enabling Legacy DecoratorsQuiz
• Accessor DecoratorsQuiz
• Decorator Return ConstraintsQuiz
• Auto-Accessor DecoratorsQuiz
• Decorator FactoriesQuiz
• Enabling emitDecoratorMetadataFlashcard
• Accessor DecoratorsFlashcard
• Application Order Across MembersFlashcard
• reflect-metadata LibraryFlashcard
• addInitializer in Stage 3Flashcard
• Class Decorator SignatureFlashcard
• Replacing a ConstructorFlashcard
• Defining Custom MetadataFlashcard
• Method Decorator SignatureFlashcard
• Parameter DecoratorsFlashcard
• Decorator FactoriesFlashcard
• Stage 3 Decorator SignatureFlashcard
• Typing Decorators GenericallyFlashcard
• Decorator Placement LimitsFlashcard
• Reading MetadataFlashcard
• Enabling experimentalDecoratorsFlashcard
• Legacy vs Stage 3 DecoratorsFlashcard
• PropertyDescriptor in Method DecoratorsFlashcard
• Property Decorators and LimitsFlashcard
• Decorator Evaluation OrderFlashcard
• design: Metadata KeysFlashcard
• Dependency Injection with MetadataFlashcard
• Auto-accessor KeywordFlashcard
• Practical Decorator Use CasesFlashcard