baniol/html_slider.html

## html_slider.html
<!DOCTYPE html>
<html>
<head>
  <title></title>
  <style>
    body {
      padding-top: 200px;
    }
    input::after {
      content: attr(data-value) '/' attr(max);
      position: relative;
      left: 135px; top: -20px;
    }
  </style>
</head>
<body>
  <h2>from: http://www.htmlfivecan.com/#23</h2>
  <input type="range" min="0" max="100" value="25">
  <script>
    var input = document.querySelector('input');
    input.dataset.value = input.value; // Set an initial value.

    input.addEventListener('change', function(e) {
      this.dataset.value = this.value;
    });
  </script>

</body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<title></title>
	<style>
	body {
	padding-top: 200px;
	}
	input::after {
	content: attr(data-value) '/' attr(max);
	position: relative;
	left: 135px; top: -20px;
	}
	</style>
	</head>
	<body>
	<h2>from: http://www.htmlfivecan.com/#23</h2>
	<input type="range" min="0" max="100" value="25">
	<script>
	var input = document.querySelector('input');
	input.dataset.value = input.value; // Set an initial value.

	input.addEventListener('change', function(e) {
	this.dataset.value = this.value;
	});
	</script>

	</body>
	</html>