golang for cordova plugins

[Joe Blue]

i have been experimenting with cordova to learn the basics on desktop and mobile.

I have some high level questions that i cant find a definitive answer on:

1. With golang i can compile the same code to run on all desktops and mobile phones. 

So, with Cordova can i use the same code on each platform ?

For example on windows, cordova docs make it look like i MUST use c#. I woudl prefer to use golang on windows of course. Can i do this ?

2. On mobile i can compile my code so its callable from Java and IOS (objective c).

I have gotten this working well for android, but am looking for example with objective c / IOS if anyone can link any.

3. Call back direction.

The way we all call a cordova plugin from the web browser is via a very simple JS api that is the core basis for Cordova. 

How to call from my plugin (written in golang in my case) to the browser ? 

thanks in advance

Joe