m1k3yfoo/css-variables.html

## css-variables.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Scoped CSS Variables and JS</title>
</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="#ffc600">
  </div>

  <img src="https://source.unsplash.com/7bwQXzbF6KE/800x500">

  <style>
    /* Declaring CSS variables */
    :root {
      --base: #ffc600;
      --spacing: 10px;
      --blur: 10px;
    }

    img {
      padding: var(--spacing);
      background: var(--base);
      filter: blur(var(--blur));
    }

    /* Anything with a class "highlight" */
    .hl {
      color: var(--base);
    }

    /*
      misc styles, nothing to do with CSS variables
    */

    body {
      text-align: center;
      background: #193549;
      color: white;
      font-family: 'helvetica neue', sans-serif;
      font-weight: 100;
      font-size: 50px;
    }

    .controls {
      margin-bottom: 50px;
    }

    input {
      width:100px;
    }
  </style>

  <script>
    /* Selecting all the elements with the inputs under class "controls"  */
    const inputs = document.querySelectorAll('.controls input');

    function handleUpdate() {
      console.log(this.value);

      // Referencing input element's 'data-sizing' attribute. 'data-sizing' is a custom data attribute for adding the 'px' unit to our values
      const suffix = this.dataset.sizing || '';
      document.documentElement.style.setProperty(`--${this.name}`, this.value + suffix);
    }
    // Listen for change on the inputs
    inputs.forEach(input => input.addEventListener('change', handleUpdate));
    inputs.forEach(input => input.addEventListener('mousemove', handleUpdate));
  </script>

</body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Scoped CSS Variables and JS</title>
	</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="#ffc600">
	</div>

	<img src="https://source.unsplash.com/7bwQXzbF6KE/800x500">

	<style>
	/* Declaring CSS variables */
	:root {
	--base: #ffc600;
	--spacing: 10px;
	--blur: 10px;
	}

	img {
	padding: var(--spacing);
	background: var(--base);
	filter: blur(var(--blur));
	}

	/* Anything with a class "highlight" */
	.hl {
	color: var(--base);
	}

	/*
	misc styles, nothing to do with CSS variables
	*/

	body {
	text-align: center;
	background: #193549;
	color: white;
	font-family: 'helvetica neue', sans-serif;
	font-weight: 100;
	font-size: 50px;
	}

	.controls {
	margin-bottom: 50px;
	}

	input {
	width:100px;
	}
	</style>

	<script>
	/* Selecting all the elements with the inputs under class "controls" */
	const inputs = document.querySelectorAll('.controls input');

	function handleUpdate() {
	console.log(this.value);

	// Referencing input element's 'data-sizing' attribute. 'data-sizing' is a custom data attribute for adding the 'px' unit to our values
	const suffix = this.dataset.sizing \|\| '';
	document.documentElement.style.setProperty(`--${this.name}`, this.value + suffix);
	}
	// Listen for change on the inputs
	inputs.forEach(input => input.addEventListener('change', handleUpdate));
	inputs.forEach(input => input.addEventListener('mousemove', handleUpdate));
	</script>

	</body>
	</html>