https://velog.io/@takeknowledge/%EB%A1%9C%EC%BB%AC%EC%97%90%EC%84%9C-CORS-policy-%EA%B4%80%EB%A0%A8-%EC%97%90%EB%9F%AC%EA%B0%80-%EB%B0%9C%EC%83%9D%ED%95%98%EB%8A%94-%EC%9D%B4%EC%9C%A0-3gk4gyhreu

Access to XMLHttpRequest at 'http://127.0.0.1/data/obj_data.do' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

에 대한 명쾌한 솔루션입니다.

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