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1. How to fix the CORS issue on backend... How to fix the CORS issue on backend side , java Springboot App (Handling Simple CORS requests)

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   //Contents from https://spring.io/understanding/CORS 

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   In the simplest scenario, cross-origin communications starts with a client making a GET, POST, or HEAD request against a resource on the server.

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   In this scenario, the content type of a POST request is limited to application/x-www-form-urlencoded, multipart/form-data, or text/plain. The request includes an Origin header that indicates the origin of the client code.

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