멱등성 키

<div class="viz"><h3>POST /orders · KEY K7</h3><div class="row"><div class="box">try 1<br>try 2</div><span class="arrow">→</span><div class="box" id="gate">key store</div><span class="arrow">→</span><div class="box">orders <b id="count" class="accent">0</b></div></div><div class="muted" id="result">processing…</div></div>

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let retry=false;function draw(){retry=!retry;document.getElementById('count').textContent='1';document.getElementById('gate').classList.toggle('hit',retry);document.getElementById('result').textContent=retry?'attempt 2 · cached result · no new order':'attempt 1 · order created'}draw();setInterval(draw,1600)