Task queue priority and fairness

<div class="scene"><div class="title">SHARED WORKER DISPATCH</div><div class="switch" id="priority">PRIORITY ON</div><div class="dispatch"><div class="queueItems"><span>A standard</span><span id="urgent">B urgent</span><span>A standard</span></div><div class="worker">WORKER<br><b id="next">B urgent</b></div></div><div class="counts"><span id="countA">A served 0</span><span id="countB">B served 0</span></div></div>

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let priority=true,a=0,b=0,n=0;function tick(){const chooseB=priority?n%3!==2:n%2===1;if(chooseB)b++;else a++;document.getElementById('next').textContent=chooseB?'B urgent':'A standard';document.getElementById('countA').textContent='A served '+a;document.getElementById('countB').textContent='B served '+b;document.getElementById('priority').textContent=priority?'PRIORITY ON':'FAIRNESS VIEW';n++}tick();setInterval(tick,950);document.getElementById('priority').addEventListener('pointerdown',()=>{priority=!priority;tick()})