in src/site/assets/js/bootstrap.esm.js [4385:4411]
refresh() {
const autoMethod = this._scrollElement === this._scrollElement.window ? METHOD_OFFSET : METHOD_POSITION;
const offsetMethod = this._config.method === 'auto' ? autoMethod : this._config.method;
const offsetBase = offsetMethod === METHOD_POSITION ? this._getScrollTop() : 0;
this._offsets = [];
this._targets = [];
this._scrollHeight = this._getScrollHeight();
const targets = SelectorEngine.find(SELECTOR_LINK_ITEMS, this._config.target);
targets.map(element => {
const targetSelector = getSelectorFromElement(element);
const target = targetSelector ? SelectorEngine.findOne(targetSelector) : null;
if (target) {
const targetBCR = target.getBoundingClientRect();
if (targetBCR.width || targetBCR.height) {
return [Manipulator[offsetMethod](target).top + offsetBase, targetSelector];
}
}
return null;
}).filter(item => item).sort((a, b) => a[0] - b[0]).forEach(item => {
this._offsets.push(item[0]);
this._targets.push(item[1]);
});
}