Disable Checkboxes based on Condition

Question

Lets consider I'm having two sites X and Y. Based on my selection of site the following check boxes should enable/Greyout. 
 Initially all should unchecked as shown in the below snippet. 
 If i select the Site X then A and C should enable (i can Check A or C or both) to check and B should be greyout. 
 If i select the Site Y then A and B should enable ( i can Check A or B or both) to check and C should be Greyout. 
 Could you please help me with some sample code. 
 Note: Site will be passed through a ri variable.

Thanks.

Mike Schmitt · Answer

In the vanilla a!checkboxField(), you can't enable/disable individual items inherently. Depending on the severity of your use case, there are a few different possible workarounds, though they can be quite a bit more of a pain to implement. One of these is to stack a few different checkboxFields each having one checkbox; another option is to have a selectable grid where you control the checkbox availability on a row-by-row basis.

Mike Schmitt · Answer

Some past threads actually have workable code samples for this. Check out the linked thread, though if you have further questions I suggest replying again to this one instead of reviving the old one. 
 BTW, usually i suggest searching different combinations of phrases in the community search bar as sometimes these old threads won't match the first thing you try.