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/* Other JS: */
/* Other JS: */
/* Force-load images/media when a MobileFrontend section is expanded */
(function () {
function forceLoadIn(root) {
if (!root) return;
// <img> with native lazy or data-* sources
var imgs = root.querySelectorAll('img[loading="lazy"], img[data-src], img[data-srcset], img.lazyload');
imgs.forEach(function (img) {
try {
// Promote data-* to real attrs if present
if (img.dataset) {
if (img.dataset.src) img.src = img.dataset.src;
if (img.dataset.srcset) img.srcset = img.dataset.srcset;
if (img.dataset.sizes) img.sizes = img.dataset.sizes;
}
// Disable lazy & decode ASAP
img.loading = 'eager';
try { img.decoding = 'sync'; } catch (e) {}
// Kick browsers that already set src but kept it idle due to prior hidden state
var s = img.currentSrc || img.src;
if (s) { img.src = ''; img.src = s; }
} catch (e) {}
});
// Background images deferred via data-bg
var bgs = root.querySelectorAll('[data-bg]');
bgs.forEach(function (el) {
var bg = el.getAttribute('data-bg');
if (bg) {
el.style.backgroundImage = 'url("' + bg + '")';
el.removeAttribute('data-bg');
}
});
// Videos commonly start with preload="none" on mobile
var vids = root.querySelectorAll('video[preload="none"], video[data-poster]');
vids.forEach(function (v) {
try {
v.preload = 'metadata';
if (v.dataset && v.dataset.poster && !v.poster) v.poster = v.dataset.poster;
// Nudge the browser
if (v.paused) v.load();
} catch (e) {}
});
}
// On heading click (MobileFrontend/Minerva uses section headings as toggles)
function onToggle(e) {
var heading = e.target && e.target.closest &&
e.target.closest('.section-heading, .mf-section-heading, .toc-mobile__section-heading, h2, h3, h4');
if (!heading) return;
// Wait for classes/ARIA to update
setTimeout(function () {
var section = heading.closest('.section, .mf-section, .collapsible-block, .mf-collapsible-block, .mobile-collapse');
if (!section) return;
var isOpen = section.classList.contains('open-block') ||
section.getAttribute('aria-expanded') === 'true';
if (isOpen) forceLoadIn(section);
}, 0);
}
document.addEventListener('click', onToggle, true);
// Fallback: observe class/ARIA flips (covers non-click expansions)
var mo = new MutationObserver(function (mutations) {
mutations.forEach(function (m) {
var el = m.target;
if (!el) return;
var isOpen = el.classList && el.classList.contains('open-block');
if (!isOpen && el.getAttribute) {
isOpen = el.getAttribute('aria-expanded') === 'true';
}
if (isOpen) forceLoadIn(el);
});
});
function attachObservers() {
document.querySelectorAll('.mf-collapsible-block, .collapsible-block, .section, .mf-section, .mobile-collapse')
.forEach(function (el) {
mo.observe(el, { attributes: true, attributeFilter: ['class', 'aria-expanded'] });
});
}
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', attachObservers);
} else {
attachObservers();
}
// Ensure lead content eagerly loads as well
var lead = document.querySelector('#mf-section-0, .lead, #bodyContent, .content');
if (lead) forceLoadIn(lead);
})();