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index-START.html
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index-START.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Scoped CSS Variables and JS</title>
<link href="https://fonts.googleapis.com/css?family=Work+Sans:100,200,300,regular,500,600,700,800,900,100italic,200italic,300italic,italic,500italic,600italic,700italic,800italic,900italic" rel="stylesheet" />
</head>
<body>
<h2>Update CSS Variables with <span class='hl'>JS</span></h2>
<div class="controls">
<label for="spacing">Spacing:</label>
<input id="spacing" type="range" name="spacing" min="10" max="200" value="10" data-sizing="px">
<label for="blur">Blur:</label>
<input id="blur" type="range" name="blur" min="0" max="25" value="10" data-sizing="px">
<label for="base">Base Color:</label>
<input id="base" type="color" name="base" value="#8578fa">
</div>
<img src="https://source.unsplash.com/7bwQXzbF6KE/800x500">
<style>
:root {
--base: #8578fa;
--spacing: 10px;
--blur: 10px;
}
img {
padding: var(--spacing);
background: var(--base);
filter: blur(var(--blur));
}
.hl {
color: var(--base);
}
/*
misc styles, nothing to do with CSS variables
*/
body {
text-align: center;
background: #383c3f;
color: white;
font-family: 'Work Sans';
font-weight: 200;
font-size: 50px;
}
h2 {
font-weight: 200;
}
.controls {
margin-bottom: 50px;
}
input {
width: 100px;
}
</style>
<script>
const inputs = document.querySelectorAll('.controls input');
function handleUpdate() {
const suffix = this.dataset.sizing || '';
document.documentElement.style.setProperty(`--${this.name}`, this.value + suffix);
};
inputs.forEach(input => {
input.addEventListener('change', handleUpdate);
});
inputs.forEach(input => {
input.addEventListener('mousemove', handleUpdate);
});
</script>
</body>
</html>