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프론트엔드를 NUXT를 이용해 개발을 하면서 Spring으로 개발한 API를 불러오는 과정에서 CORS 문제가 발생했다. .....has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled. 먼저 CORS가 무엇인지 알아보자 CORS(Cross-..