code: function fixVerticalPositionIE() {
    var container = getContainer();
    var popup = getPopup();
    container.style.removeProperty('align-items');
  
    if (popup.offsetTop < 0) {
      container.style.alignItems = 'flex-start';
    }
  }
docs: Fix IE11 centering sweetalert2/issues/933 /* istanbul ignore next