Cross Origin Resource Sharing - Explained by Example

Dive into the intricacies of Cross Origin Resource Sharing (CORS) through practical examples in this 23-minute video tutorial. Explore common CORS-related errors and learn how to resolve them step-by-step. Begin with an introduction to CORS, then progress through various scenarios including direct same-origin access, missing 'Access-Control-Allow-Origin' headers, mismatched origin values, preflight request failures, and unauthorized request header fields. Gain valuable insights into troubleshooting and implementing CORS effectively to ensure smooth resource sharing across different domains in your web applications.

intro
Direct same origin access
No 'Access-Control-Allow-Origin' header is present
The ‘Access-Control-Allow-Origin' header has a different value from the origin
OPTIONS 405 Method not Allowed Preflight failed
Response to preflight request did not pass No 'Access-Control-Allow-Origin' header is present
Request header field “Content-Type” is not allowed