![]() Preflight requests for complex HTTP calls Using *) and must set Access-Control-Allow-Credentials to true. This will includeĪccess-Control-Allow-Origin must be set to a specific origin (no wildcard Using CORS (which could identify the sender), you need to add additional headersĪdd credentials: 'include' to the fetch options like below. The request doesn't identify the requestor. ![]() Share credentials with CORSįor privacy reasons, CORS is normally used for "anonymous requests"-ones where This time, your request should not be blocked. The second endpoint (line 13) sends the same file in response but addsĪccess-Control-Allow-Origin: * in the header. You should see an error saying: request has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header
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