refresh method
void
refresh()
Refresh the cached y-position values of spied items.
Implementation
void refresh() {
_anchors.clear();
for (final e in _$body.find(_selector)) {
final href = p.getDataTarget(e)!;
if (!_ANC_EXP.hasMatch(href))
continue;
final $href = $(href);
if (!$href.isEmpty) {
final offset = $href.first.offsetTop + (element is BodyElement ? 0 : element.scrollTop);
_anchors.add(_Anchor(offset, href));
}
}
_anchors.sort((_Anchor a, _Anchor b) => a.offset - b.offset);
}