Javascript deep copying object [duplicate]

Answer 1

This is really hacky, but this should work. I suggest doing as the other users have suggested in the comments; find a pre-existing library that will do this for you.

for(var key in user1){  
   var temp = User[key]
   User[key] = user1[key];   
   for(var key1 in temp){
      if(User[key][key1] == null){
         User[key][key1] = temp[key1];
      }
   }
}