QUnit.test( 'lazyload srcset', function( assert ) { 'use strict'; var done = assert.async(); var gallery = document.querySelector('#lazyload-srcset'); var flkty = new Flickity( gallery, { lazyLoad: 1 }); var loadCount = 0; flkty.on( 'lazyLoad', function( event, cellElem ) { loadCount++; assert.equal( event.type, 'load', 'event.type == load' ); assert.ok( event.target.complete, 'img ' + loadCount + ' is complete' ); assert.ok( cellElem, 'cellElement argument there' ); var srcset = event.target.getAttribute('srcset'); assert.ok( srcset, 'srcset attribute set'); var lazyAttr = event.target.getAttribute('data-flickity-lazyload-srcset'); assert.ok( !lazyAttr, 'data-flickity-lazyload attribute removed' ); // after first 2 have loaded, select 7th cell if ( loadCount == 2 ) { done(); } }); });