Vertically centering Bootstrap modal window

Question

I would like to center my modal on the viewport (middle) I tried to add some css properties

 .modal { position: fixed; top:50%; left:50%; }   

Answer 1

To make Modal verically Align Middle All dialog.

/* Note:

1.Even you don't need to assign selector , it will find all modal from the document and make it vertically middle

2.To avoid middle some specific modal to be it center you can use :not selector in click event

*/

 $( "[data-toggle='modal']" ).click(function(){
     var d_tar = $(this).attr('data-target'); 
     $(d_tar).show();   
     var modal_he = $(d_tar).find('.modal-dialog .modal-content').height(); 
     var win_height = $(window).height();
     var marr = win_height - modal_he;
     $('.modal-dialog').css('margin-top',marr/2);
  });

From Milan Pandya