[Solved] What will happen if you call app.enableCors({ origin: 'https://example.com' }) in a NestJS app? — Ans: Only requests from https://example.com will be allowed cross-origin access | NestJS

NestJS - Middleware

What will happen if you call app.enableCors({ origin: 'https://example.com' }) in a NestJS app?

AThe app will throw a runtime error

BOnly requests from https://example.com will be allowed cross-origin access

CCORS will be disabled for all requests

DAll origins will be allowed to access the app

Step-by-Step Solution

Solution:

Step 1: Understand the CORS origin option
Setting origin to a specific URL restricts cross-origin requests to that URL only.
Step 2: Analyze the effect on other origins
Requests from other origins will be blocked by CORS policy. No error is thrown by NestJS.
Final Answer:
Only requests from https://example.com will be allowed cross-origin access -> Option B
Quick Check:
CORS origin option restricts allowed origins [OK]

Quick Trick: Set origin to allow only specific domains in CORS [OK]

Common Mistakes:

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What will happen if you call app.enableCors({ origin: 'https://example.com' }) in a NestJS app?