has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. 에러

Access to XMLHttpRequest at '~~~~~~' from origin '~~~~~~~~' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

 

어쩌구 저쩌구 CORS정책에 의해서 차단됨

 

 

frontend에서 backend api를 호출할 때 backend cors설정이 안돼 있으면 뜨는 오류 Backend친구에게 CORS해결해 달라고 말해보자