// Example 1: From an element in DOM
$('.open-popup-link').magnificPopup({
  type:'inline',
  midClick: true // allow opening popup on middle mouse click. Always set it to true if you don't provide alternative source.
});

// Example: 2 Dynamically created
$('button').magnificPopup({
  items: {
      src: '<div class="white-popup">Dynamically created popup</div>',
      type: 'inline'
  },
  closeBtnInside: true
});

