CORS, Preflight Request, OPTIONS Method | Access Control Allow Origin Error Explained

- What is CORS?
- What is Cross Origin?
- Are subdomain, host, port, protocol fall under Cross-Origin mechanism?
- How does Cross Origin Request Sharing works behind the scenes?
- What is CORS preflight?
- What is the OPTIONS call?
- What are the additional HTTP Headers required?
- Does server always make Preflight options call in CORS protocol?
- What browser versions support CORS?
- Access Control Allow Origin Error?
- How to solve CORS Error?
- How to resolve CORS issue in Google Chrome?

MDN Link - https://developer.mozilla.org/en-US/d...

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