Cors Issues Accessing API

[pradeepperi]

Hi,

I am facing issues in accessing an api from my PCF Control (calling the api from componentDidMount method). I am getting the below error message while calling the api. Surprisingly , this is not the error that occurs each time. Most of the time api call succeeeds and gets the data, but 20% of the api calls are failing with this error from the control. we are allowing ".dynamics.com" to send requests. Please note that this problem does not occur all the times, but pretty randomly some times ~20% times. 

Access to fetch at '*********' from origin '******' has been blocked by CORS policy: 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.

[ben-thompson]

@a33ik The risk with that is that unless and until it's documented it could break at any point.