jquery select first child with class of a parent with class

Question

How can i select only the first child of a particular class of a parent with a particular class for the purposes of clone()?

Answer 1

Use :first-child

var form1 = $(this).closest('.sector_order').find(':first-child');

OR .first()

var form1 = $(this).closest('.sector_order').find('.line_item_wrapper').first();