X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/ff4c0a9acfa464db3b32edd07f784e00406303b5..20bd2492d8bd211816c5120595b19a0a828b9f0c:/project/static/js/jquery.lazyload.js

diff --git a/project/static/js/jquery.lazyload.js b/project/static/js/jquery.lazyload.js
index 522250ff..c15167bd 100644
--- a/project/static/js/jquery.lazyload.js
+++ b/project/static/js/jquery.lazyload.js
@@ -23,6 +23,9 @@
         }
         
         function checkScroll() {
+            if (container.data('lazyload:lastCheckedScrollTop') == undefined) {
+                return;
+            }
             if (Math.abs(container.scrollTop() - container.data('lazyload:lastCheckedScrollTop')) > settings.scrollThreshold) {
                 container.data('lazyload:lastCheckedScrollTop', container.scrollTop());