(function(){ var BAND=121,HEAD=109; var bound=null,obs=[],pending=false; function stop(){for(var z=0;zsr.right-pad){d=lr.right-(sr.right-pad);} if(d)strip.scrollBy({left:d,behavior:mq.matches?'auto':'smooth'}); } // Which edges are hiding tabs, from real measurements. Driven by the strip's // own scroll + resize rather than a one-shot read: the dock's reveal changes // clientWidth mid-scroll, which is exactly when the fade has to appear. function edges(){ if(!strip)return; var max=strip.scrollWidth-strip.clientWidth,v; if(max<=1){v='none';} else if(strip.scrollLeft<=1){v='r';} else if(strip.scrollLeft>=max-1){v='l';} else{v='lr';} if(strip.getAttribute('data-edge')!==v)strip.setAttribute('data-edge',v); } if(strip){ strip.addEventListener('scroll',edges,{passive:true}); obs.push({disconnect:function(){strip.removeEventListener('scroll',edges);}}); if(window.ResizeObserver){var ro=new ResizeObserver(edges);ro.observe(strip);obs.push(ro);} edges(); } if(watched.length){ var spy=new IntersectionObserver(function(es){ var vis=[],j; for(j=0;j=0.99){reveal(false);}else if(!seen){reveal(r<0.5);} seen=true; },{rootMargin:'-'+HEAD+'px 0px 0px 0px',threshold:[0,1]}); obs.push(idobs); idobs.observe(anchor); } // REBIND, DO NOT JUST RETRY. React replaces this whole subtree when it takes // the page over, so the rail present at DOMContentLoaded is a throwaway: the // nodes an early pass would have observed end up detached, and the observers // then fire against elements no longer on screen - the failure looks exactly // like "the script never ran". Keying on the rail NODE (not a boolean) means // a replaced tree rebinds to the live one and the old observers are dropped. // This also covers a Next client-side navigation between two carrier records. function scan(){ if(bound&&bound.isConnected)return; if(pending)return; pending=true; requestAnimationFrame(function(){pending=false;init();}); } document.addEventListener('DOMContentLoaded',init); window.addEventListener('load',init); new MutationObserver(scan).observe(document.documentElement,{childList:true,subtree:true}); init(); })();

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