mirror of
https://github.com/puppeteer/puppeteer
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44 lines
915 B
HTML
44 lines
915 B
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<style>
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body {
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min-height: 100vh;
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margin: 0;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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div {
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width: 105px;
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height: 105px;
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background: #cdf;
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padding: 5px;
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}
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</style>
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<title>Element: wheel event - Scaling_an_element_via_the_wheel - code sample</title>
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</head>
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<body>
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<div>Scale me with your mouse wheel.</div>
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<script>
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function zoom(event) {
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event.preventDefault();
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scale += event.deltaY * -0.01;
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// Restrict scale
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scale = Math.min(Math.max(.125, scale), 4);
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// Apply scale transform
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el.style.transform = `scale(${scale})`;
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}
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let scale = 1;
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const el = document.querySelector('div');
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el.onwheel = zoom;
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</script>
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</body>
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</html>
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