HAR network tracing

<div class="stage"><div class="title">HAR NETWORK TRACE</div><div class="canvas"><div class="waterfall"><div><span>document</span><i id="bar0"></i></div><div><span>data</span><i id="bar1"></i></div><div><span>image</span><i id="bar2"></i></div></div><div class="total" id="total">recording requests</div></div></div>

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let n=0;function record(){const step=n++%3;[0,1,2].forEach((i)=>document.getElementById('bar'+i).style.width=i<=step?[28,75,42][i]+'%':'0');document.getElementById('total').textContent=step===2?'slowest: data response':'recording requests'}record();setInterval(record,900)