<div  data-dialog="somedialog" class="trigger" >1</div><br>
<div  data-dialog="somedialog" class="trigger" >2</div><br>
<div  data-dialog="somedialog" class="trigger" >3</div><br>
<div  data-dialog="somedialog" class="trigger" >4</div><br>
<div  data-dialog="somedialog" class="trigger" >5</div><br>

<div id="somedialog" class="dialog">
                    <div class="dialog__overlay"></div>
                    <div class="dialog__content">
                        Диалоговое окно<div><button class="action" data-dialog-close>Close</button></div>
                    </div>
                </div>

window.dlgtrigger = document.querySelector('[data-dialog]'),
  window.somedialog = document.getElementById(window.dlgtrigger.getAttribute('data-dialog')),
  window.dlg = new DialogFx(window.somedialog);

window.dlgtrigger.addEventListener('click', window.dlg.toggle.bind(window.dlg));

$(".trigger").click(function() {

  dlg.toggle.bind(dlg)();


});

window.dlgtrigger.addEventListener('click', window.dlg.toggle.bind(window.dlg));

$(".trigger").click(function() {
  dlg.toggle.bind(dlg)();
});