Slick slider в magnific popup

gistfile1.txt

$('.open-popup-link-2').attr("data-effect","mfp-move-horizontal").magnificPopup({
	  type:'inline',
	  removalDelay: 500, //delay removal by X to allow out-animation
	  callbacks: {
	    beforeOpen: function() {
	       this.st.mainClass = this.st.el.attr('data-effect');
	    }
	  },
	  midClick: true,
	  callbacks: {open: initSliders}
	});
	function initSliders() {
		$('.single-item').slick();
	};