Not able to connect CRM Web API with External Web Site

Hello All,

I am trying to connect MS Dynamic CRM Web API with the external website.

Where I am calling CRM Web API at Client Side. But I m getting an error

Failed to load https://login.microsoftonline.com/common/oauth2/token: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:50256' is therefore not allowed access. The response had HTTP status code 400.