9 lines
329 B
HTML
9 lines
329 B
HTML
<!doctype html>
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<meta charset="utf-8">
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<title>busy</title>
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<button id="busy">busy</button>
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<script>
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window.busyLoop = (ms) => { const t = performance.now(); while (performance.now() - t < ms) {} return performance.now() - t; };
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document.getElementById('busy').addEventListener('click', () => window.busyLoop(120));
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</script>
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