Angular - Services and Dependency Injection
To maintain a consistent user authentication state accessible by multiple Angular components, what is the best practice involving services?
To maintain a consistent user authentication state accessible by multiple Angular components, what is the best practice involving services?
hard🧠 Conceptual Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify shared state need
User login status must be shared across components.Step 2: Use singleton service
A singleton service provided in root ensures one shared instance.Step 3: Inject service in components
Injecting the service allows components to access and update login status consistently.Final Answer:
Create a singleton service that holds the login status and inject it where needed -> Option DQuick Check:
Singleton services share state across components [OK]
Quick Trick: Singleton services share state across components [OK]
Common Mistakes:
MISTAKES- Using local variables instead of shared service
- Creating multiple service instances causing inconsistent state
- Relying only on root component without services
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