{CodeRoyale}
All challenges
Multiple ChoiceIntermediate 30s

CORS Preflight

A preflight OPTIONS request is sent for:
Options
  1. 1All GET requests, since any cross-origin read triggers a preflight
  2. 2Image loads and stylesheet fetches made from another origin
  3. 3Non-simple requests (custom headers, PUT/DELETE, JSON content-type)
  4. 4Same-origin requests, which the browser always preflights first
fullstackmcqintermediate

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