Is window.atob(input)/window.btoa(input) methods are working in Desktop Studio(SAP IRPA)?

Hi,

I am trying to use window object in Desktop Studio (SAP IRPA) to download Base64 content in file format(.xlsx). In that process i found pre-defined methods (decodeArrayBuffer) available in desktop studio libraries.so i thought to use of the available methods in it. But i am getting an error like "window is undefined" while using decodeArrayBuffer method.

I have doubts as below:

1. Do i have to enable anything while using window objects in desktop studio?
2. Do we have provision to workout all pre-defined methods in desktop studio especially in Trail Version?

   

   

   

Could anyone please suggest me as soon as possible.

Thanks in Advance.