How do you enable CORS for a SPA?
PICTURE THIS: BROWSER VS ATTACKER
Simple meaning
I add CORS policy with allowed origins, methods, and headers, then UseCors.
WHY — ASP.NET instead of guessing?
Why interviewers care about ASP.NET:
question about ASP.NET.
trade-offs, and what you would actually do on a .NET project - not buzzwords.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1I add CORS policy
with allowed origins, methods, and headers, then UseCors.
- 2Why it exists
Credentials need careful AllowAnyOrigin avoidance.
- 3I never use *
with cookies.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
I add CORS policy with allowed origins, methods, and headers, then UseCors. Credentials need careful AllowAnyOrigin avoidance.