SQL property graph queries

<div class="demo"><div class="head"><b>SQL/PGQ PATH</b><span>MATCH (A)-[]->(next)</span></div><div class="stage pgq"><div class="vertex" id="graphA">A</div><div class="edge" id="edgeAB">→</div><div class="vertex" id="graphB">B</div><div class="edge" id="edgeBC">→</div><div class="vertex" id="graphC">C</div></div><div class="foot"><span id="graphstatus">start at A</span><span>1 · 2 hops</span></div></div>

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let n=0;function tick(){['graphA','graphB','graphC'].forEach((id,i)=>document.getElementById(id).classList.toggle('on',i<=n));['edgeAB','edgeBC'].forEach((id,i)=>document.getElementById(id).classList.toggle('on',i<n));document.getElementById('graphstatus').textContent=['start at A','A → B: 1 hop','A → B → C: 2 hops'][n];n=(n+1)%3}tick();const t=setInterval(tick,900);document.querySelector('.demo').onclick=()=>{clearInterval(t);tick()}