Angular - Advanced Patterns
Which of the following is the correct way to inject a facade service MyFacadeService into an Angular component constructor?
Which of the following is the correct way to inject a facade service MyFacadeService into an Angular component constructor?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall Angular dependency injection syntax
Angular injects services via constructor parameters with access modifiers and type annotations.Step 2: Match correct syntax
constructor(private myFacadeService: MyFacadeService) {} usesprivateand typeMyFacadeService, which is correct.Final Answer:
constructor(private myFacadeService: MyFacadeService) {} -> Option AQuick Check:
Inject service with private + type [OK]
Quick Trick: Use private and type in constructor for injection [OK]
Common Mistakes:
- Omitting access modifier (private/public)
- Using new keyword inside constructor parameters
- Assigning service without type annotation
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