Add placeholders to all list elements in Gravity Forms.

gform list placeholders

  $('.gfield_list_cell').each(function(){
        var $this = $(this),
            $tr = $('tr', $this.parent().parent().prev()),
            i = $this.index();
        $('input', $this).attr('placeholder', $('th:eq('+i+')', $tr).text());		
   });

This is what worked for me:

$('.gfield_list_cell').each(function() {
  	
  	// Set vars
  	var input = $(this).children();
        var label = input.attr('aria-label');
    
       // Set placeholder
       input.attr('placeholder', label);

});

The data-label attribute of gfield_list_cell can be used to remove the additional text in the aria-label attribute.
This works fine for me.