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Formatting test 2
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.idea |
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<!doctype html> | |
<html> | |
<head> | |
<title>Formatting test 2</title> | |
<link rel="stylesheet" href="style.css"> | |
</head> | |
<body> | |
<h1>Formatting test 2 (set class with non-inherited property)</h1> | |
<div style="padding: 10px;"> | |
<button type="button" id="theButton">Go!</button> | |
</div> | |
<div style="padding: 10px;"> | |
<pre id="theDisplay">Total:</pre> | |
</div> | |
<div id="container" tabindex="0"> | |
<script src="script.js"></script> | |
</body> | |
</html> |
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(function () { | |
let $ = document.querySelector.bind(document) | |
let theContainer = $('#container') | |
let theButton = $('#theButton') | |
let theDisplay = $('#theDisplay') | |
let tableHTML = '' | |
for (let i = 0; i < 50; i++) { | |
tableHTML += '<div class = "row">' | |
for (let j = 0; j < 10; j++) { | |
tableHTML += '<div class = "column">' | |
for (let k = 0; k < 500; k++) { | |
tableHTML += '<div class = "cell"></div>' | |
} | |
tableHTML += '</div>' | |
} | |
tableHTML += '</div>' | |
} | |
theContainer.innerHTML = tableHTML | |
let height = theContainer.offsetHeight; | |
let count = 0 | |
theButton.addEventListener('click', () => { | |
requestAnimationFrame(() => { | |
height = theContainer.offsetHeight; | |
theDisplay.innerText = 'Total:' | |
requestAnimationFrame(() => { | |
performance.mark('start') | |
theContainer.classList.add('bg-blue') | |
height = theContainer.offsetHeight; | |
performance.mark('end') | |
performance.measure(`total_${++count}`, 'start', 'end') | |
theContainer.classList.remove('bg-blue') | |
theDisplay.innerText = `Total: ${performance.getEntriesByName(`total_${count}`).slice(-1)[0].duration}ms` | |
}) | |
}) | |
}) | |
})() |
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body { | |
margin: 0 auto; | |
padding: 10px; | |
max-width: 600px; | |
} | |
.bg-blue { | |
background-color: royalblue; | |
} | |
.bg-red { | |
background-color: crimson; | |
} | |
.column { | |
display: inline-block; | |
background: gray; | |
} | |
.row { | |
background: darkgray; | |
} | |
.cell { | |
display: inline-block; | |
background: blue; | |
width: 1px; | |
height: 1px; | |
margin-right: 1px; | |
vertical-align: top; | |
} | |
pre { | |
font-size: 32px; | |
} | |
button { | |
font-size: 18px; | |
} |
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