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Business Facilities is the leading resource for site selection and economic development, connecting Economic Development Organizations (EDOs) with senior corporate site selectors and location advisors. Delivered to 40,000 qualified decision-makers in print and reaching 30,000+ online users, we provide industry news, data, digital marketing, and face-to-face networking through our twice-annual Business Facilities LiveXchange event.

`; if (isWallpaper) { container.classList.remove('is-active'); iframe.addEventListener('load', () => { requestAnimationFrame(() => { container.classList.add('is-active'); }); }, { once: true }); } renderTarget.appendChild(iframe); container.setAttribute('data-active-id', String(spot.id)); // Avoid inline display:block overriding .gcm-sponsored-by.is-filled // (whose flex layout centers the two rows). container.style.display = isSponsoredBy ? '' : 'block'; if (!isWallpaper) { requestAnimationFrame(() => { container.classList.add('is-active'); }); } } function clearSlot(container) { const activeId = container.getAttribute('data-active-id'); if (activeId) { loadedAdKeys.delete(container.id + ':' + activeId); } clearRefreshTimer(container.id); container.classList.remove('is-active'); container.style.display = 'none'; container.setAttribute('data-active-id', ''); if (container.id === 'aje_gcm_sb_ads') { const holder = container.querySelector('.gcm-sponsored-by__creative'); if (holder) holder.innerHTML = ''; container.classList.remove('is-filled'); container.setAttribute('aria-hidden', 'true'); container.dataset.gcmSponsorStatus = 'waiting'; delete container.dataset.gcmSponsorStarted; } else { container.innerHTML = ''; } } function startRefreshTimer(slot, spot) { clearRefreshTimer(slot.containerId); const timer = setInterval(() => { if (!canRefreshAds()) return; const container = document.getElementById(slot.containerId); if (!container) { clearRefreshTimer(slot.containerId); return; } if (!window.matchMedia(spot.query).matches) { clearRefreshTimer(slot.containerId); clearSlot(container); return; } injectIframeAd(container, spot, { force: true }); }, REFRESH_MS); refreshTimers.set(slot.containerId, timer); } function processSlot(slot) { const container = document.getElementById(slot.containerId); if (!container) return; if (slot.containerId === 'aje_gcm_sb_ads' && !IS_SINGLE_POST) return; const match = slot.responsive.find( res => res.id && window.matchMedia(res.query).matches ); if (match) { injectIframeAd(container, match); // Sponsored By only becomes visible after a real creative is found. if (slot.containerId !== 'aje_gcm_sb_ads') { container.style.display = 'block'; } else { container.style.display = ''; } if (REFRESH_SLOT_IDS.has(slot.containerId)) { startRefreshTimer(slot, match); } else { clearRefreshTimer(slot.containerId); } } else { clearSlot(container); } } function checkSlots(mode = 'all') { adSlots.forEach(slot => { const isCritical = CRITICAL_SLOT_IDS.has(slot.containerId); const isScrollBound = SCROLL_SLOT_IDS.has(slot.containerId); if (mode === 'critical') { if (!isCritical) return; } else if (mode === 'delayed') { if (isCritical || isScrollBound) return; } else if (mode === 'scroll') { if (!isScrollBound) return; } processSlot(slot); }); } function debounce(fn, wait) { let t; return function() { clearTimeout(t); t = setTimeout(fn, wait); }; } /** * Handle viewport / breakpoint changes. * * Only process: * - critical slots * - scroll slots that have already activated * - delayed slots that IntersectionObserver already activated * * This prevents resize/orientation events from loading * every below-fold advertisement. */ const handleChange = debounce(() => { adSlots.forEach(slot => { const isCritical = CRITICAL_SLOT_IDS.has(slot.containerId); const isScrollBound = SCROLL_SLOT_IDS.has(slot.containerId); const isActivatedDelayed = activatedDelayedSlots.has(slot.containerId); /** * Critical ads may always react to * responsive breakpoint changes. */ if (isCritical) { processSlot(slot); return; } /** * Adhesion / scroll-bound placements should * only react after they have been activated. */ if (isScrollBound) { if (scrollStarted) { processSlot(slot); } return; } /** * Below-fold delayed ads should only react * after IntersectionObserver activates * that specific placement. */ if (isActivatedDelayed) { processSlot(slot); } }); }, 150); /** * Watch responsive breakpoints. */ function bindMediaListeners() { const allQueries = [ ...new Set( adSlots.flatMap( slot => slot.responsive.map( res => res.query ) ) ) ]; allQueries.forEach(query => { const mql = window.matchMedia(query); if ( typeof mql.addEventListener === 'function' ) { mql.addEventListener( 'change', handleChange ); } else if ( typeof mql.addListener === 'function' ) { mql.addListener( handleChange ); } }); window.addEventListener( 'resize', handleChange, { passive: true } ); window.addEventListener( 'orientationchange', handleChange, { passive: true } ); } /** * Observe non-critical, non-adhesion ads. * * Ads begin loading when they come within * approximately 800px of the viewport. */ function setupDelayedAds() { const delayedSlots = adSlots.filter(slot => { return ( !CRITICAL_SLOT_IDS.has( slot.containerId ) && !SCROLL_SLOT_IDS.has( slot.containerId ) ); }); if (!delayedSlots.length) { return; } /** * Fallback for browsers without * IntersectionObserver. */ if (!('IntersectionObserver' in window)) { setTimeout(() => { delayedSlots.forEach(slot => { activatedDelayedSlots.add( slot.containerId ); processSlot(slot); }); }, DELAY_MS); return; } const observer = new IntersectionObserver( entries => { entries.forEach(entry => { if (!entry.isIntersecting) { return; } // For a collapsed Sponsored By wrapper the observer // watches a 1x1 sentinel with a pointer to its slot. const target = entry.target; const containerId = target.dataset.gcmSlotContainer || target.id; const container = document.getElementById(containerId); const slot = delayedSlots.find( item => item.containerId === containerId ); if (!slot || !container) { observer.unobserve(target); return; } /** * Record that this specific * placement is now allowed * to load and respond to * breakpoint changes. */ activatedDelayedSlots.add( slot.containerId ); processSlot(slot); /** * Only trigger this placement * once. */ observer.unobserve(target); if (target !== container) target.remove(); }); }, { /** * Begin requesting the ad before * it actually enters the viewport. */ rootMargin: '800px 0px', threshold: 0 } ); delayedSlots.forEach(slot => { const container = document.getElementById( slot.containerId ); if (container) { if (slot.containerId === 'aje_gcm_sb_ads') { // The unit must occupy no space on no-fill, but a zero-height // box isn't a reliable IntersectionObserver target. const sentinel = document.createElement('span'); sentinel.dataset.gcmSlotContainer = container.id; sentinel.setAttribute('aria-hidden', 'true'); sentinel.style.cssText = 'position:absolute;top:0;left:0;width:1px;height:1px;opacity:0;pointer-events:none;'; container.appendChild(sentinel); container.dataset.gcmSponsorStatus = 'waiting'; observer.observe(sentinel); } else { observer.observe(container); } } }); } /** * Activate adhesion ads after the * visitor begins scrolling. */ function startScrollAds() { if (scrollStarted) { return; } scrollStarted = true; checkSlots('scroll'); } /** * Trigger adhesion inventory after * 200px of page scroll. */ function setupScrollTrigger() { const handleScroll = () => { if (window.scrollY >= 200) { startScrollAds(); window.removeEventListener( 'scroll', handleScroll ); } }; window.addEventListener( 'scroll', handleScroll, { passive: true } ); } /** * Pause adhesion refresh while the * page is hidden or does not have focus. */ function setupFocusVisibilityRefresh() { document.addEventListener( 'visibilitychange', () => { pageHasFocus = document.hasFocus(); if (!canRefreshAds()) { REFRESH_SLOT_IDS.forEach( clearRefreshTimer ); return; } adSlots.forEach(slot => { if ( !REFRESH_SLOT_IDS.has( slot.containerId ) ) { return; } processSlot(slot); }); } ); window.addEventListener( 'focus', () => { pageHasFocus = true; adSlots.forEach(slot => { if ( !REFRESH_SLOT_IDS.has( slot.containerId ) ) { return; } processSlot(slot); }); } ); window.addEventListener( 'blur', () => { pageHasFocus = false; REFRESH_SLOT_IDS.forEach( clearRefreshTimer ); } ); } /** * Initialize NUI advertisements. */ function init() { bindMediaListeners(); setupFocusVisibilityRefresh(); /** * Revenue-critical / above-fold inventory. */ checkSlots('critical'); /** * Adhesion inventory activates after * the visitor scrolls 200px. */ setupScrollTrigger(); /** * All remaining advertisements activate * only as they approach the viewport. */ if ( document.visibilityState === 'visible' ) { setupDelayedAds(); } else { document.addEventListener( 'visibilitychange', function onVisible() { if ( document.visibilityState !== 'visible' ) { return; } document.removeEventListener( 'visibilitychange', onVisible ); setupDelayedAds(); } ); } } if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', init, { once: true }); } else { init(); } })();