in assets/js/plugins/smooth-scroll.js [240:253]
var getEndLocation = function (anchor, headerHeight, offset, clip) {
var location = 0;
if (anchor.offsetParent) {
do {
location += anchor.offsetTop;
anchor = anchor.offsetParent;
} while (anchor);
}
location = Math.max(location - headerHeight - offset, 0);
if (clip) {
location = Math.min(location, getDocumentHeight() - window.innerHeight);
}
return location;
};