How to give permission to document library folder

Question

Dear all,

 

I have one document library, library has two folders,

   

   Head1

   Head2

 

along with i also have two sharepoint groups,

 

   GroupHead1 

   GroupHead2

 

I want to give permission to GroupHead1 Members to access Head1 folder, GroupHead2 Members to access Head2 folder, means only respective groups members can access,  respective folder.

 

How can i achieve this, using javascript object model (JSOM)