Thanks for the request. You’re actually the second person to request this feature. I’m working on building in advanced functionality for the 1.0 release. In the meantime, it’s possible to achieve the effect you describe above without modifying jquery.lazyloadxt.min.js. Just add this to your theme’s javascript file, or add it inline in your theme:
jQuery.extend(jQuery.lazyLoadXT, {
edgeY: 400
});
Oh, here’s a link to the github page explaining this in further detail:
https://github.com/ressio/lazy-load-xt#options
thanks for the quick solution