How do you set-up options to resolve CORS issue?

[smeresa]

Hi,
I am trying to load a pdf file from a URL and it is throwing an error :
"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."
So how do I set up options object to fix the CORS issue?