Flex-box: Align last row to grid

Question

I have a simple flex-box layout with a container like:

.grid {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-between;
}

Answer 1

Simply Use Jquery/Javascript trick to add an empty div:

if($('.exposegrid').length%3==2){
 $(".exposegrid").append('
');
}