Error: No 'Access-Control-Allow-Origin' header is present on the requested resource

Hi Guys,

I am trying to get the access token in order to embed the Power BI report. When i fetch the token using AcquireTokenAsync in C# application it works fine. But when i try to get the access token in my javascript code it throws below error:

"Failed to load https://login.microsoftonline.com/common/oauth2/token: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:65159' is therefore not allowed access."

Can anyone kindly guide me on how to workaround this error in order to obtain access token in Javascript.

Prateek Raina