JS代码

<script src="js/jquery-2.1.1.min.js" type="text/javascript"></script>
<script type="text/javascript" src="js/flickity.pkgd.js"></script>
<script type="text/javascript">
	var flkty = new Flickity('.parallax__carousel');

	var paraBG = document.querySelector('.parallax__layer--bg');
	var paraFG = document.querySelector('.parallax__layer--fg');
	var cellRatio = 1;
	var bgRatio = 0.75;
	var fgRatio = 2;

	flkty.on( 'scroll', function( progress ) {
	  paraBG.style.left = ( 0.5 - ( 0.5 + progress * 4 ) * cellRatio * bgRatio ) * 100 + '%';
	  paraFG.style.left = ( 0.5 - ( 0.5 + progress * 4 ) * cellRatio * fgRatio ) * 100 + '%';
	});

	flkty.reposition();
</script>