t){var u=1-t;return [0,1].map(function(k){return 3*u*u*(P[1][k]-P[0][k])+6*u*t*(P[2][k]-P[1][k])+3*t*t*(P[3][k]-P[2][k])})} function off(t,s){var b=B(t),d=D(t),m=Math.hypot(d[0],d[1])||1;return [b[0]+s*H*d[1]/m,b[1]-s*H*d[0]/m]} function cap(c,a0,a1,n){var r=[];for(var i=0;i0.35)root.classList.add("is-leaving");if(l>0.8)root.classList.remove("is-visible"); if(l<1.15)raf=requestAnimationFrame(frame);else reset();return} var r=ringAt(t);setRing(r.start,r.len,r.rot);var f=t%FACE_CYCLE,sm=smileAt(f);setSmile(sm);drawEyes(blinkAt(f,1.25)); snap={start:r.start,len:r.len,rot:r.rot,smile:sm};raf=requestAnimationFrame(frame)} function reset(){cancelAnimationFrame(raf);root.classList.remove("is-visible","is-leaving");state="hidden";snap=null;setRing(0,0.25,0);setSmile(0);drawEyes(0);check()} function show(){clearTimeout(hideTimer);if(state==="leaving"){cancelAnimationFrame(raf);root.classList.remove("is-leaving");state="visible";raf=requestAnimationFrame(frame);return} if(state!=="hidden")return;state="pending"; showTimer=setTimeout(function(){state="visible";shownAt=performance.now();root.classList.add("is-visible"); if(reduced.matches){setRing(0,0.25,0);setSmile(1);return}t0=performance.now();raf=requestAnimationFrame(frame)},SHOW_DELAY)} function hide(){if(state==="pending"){clearTimeout(showTimer);state="hidden";return} if(state!=="visible")return;clearTimeout(hideTimer); hideTimer=setTimeout(function(){if(present())return;if(reduced.matches||!snap){reset();return}state="leaving";leaveAt=performance.now()},Math.max(GRACE,MIN_VISIBLE-(performance.now()-shownAt)))} function present(){return !!document.querySelector("[data-atte

YouTube