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HTML

CSS

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Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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HTML

              
                - let min = -50, max = 50;
- let thumbs = [
- 	{ val: -15, lbl: 'Value A' }, 
- 	{ val: 20, lbl: 'Value B' }, 
- 	{ val: -35, lbl: 'Value C' }, 
- 	{ val: 45, lbl: 'Value D' }
- ];
- let nv = thumbs.length;
- let layers = thumbs.map((c, i) => `linear-gradient(90deg, red calc(var(--r) + (var(--v${i}) - var(--min))/var(--dif)*var(--uw)), transparent 0)`);

.wrap(role='group' aria-labelledby='multi-lbl' 
			style=`${thumbs.map((c, i) => `--v${i}: ${c.val}`).join('; ')}; 
						 --min: ${min}; --max: ${max};
						 --fill: ${layers.join(', ')}`)
	#multi-lbl Multi thumb slider:
	- for(let i = 0; i < nv; i++)
		label.sr-only(for=`v${i}`) #{thumbs[i].lbl}
		input(type='range' id=`v${i}` min=min value=thumbs[i].val max=max)
		output(for=`v${i}` style=`--c: var(--v${i})`)
              
            
!

CSS

              
                @mixin track() {
	width: 100%; height: 100%;
	background: none /* get rid of Firefox track background */
}

@mixin thumb() {
	border: none; /* get rid of Firefox thumb border */
	width: var(--d); height: var(--d);
	border-radius: 50%; /* make circular */
	background: currentcolor;
	pointer-events: auto
}

/* fix too small font-size in both Chrome & Firefox */
* { font: inherit }

.wrap {
	--w: 20em;
	--h: 2em;
	--d: var(--h);
	--r: calc(.5*var(--d));
	--uw: calc(var(--w) - var(--d));
	--dif: calc(var(--max) - var(--min));
	display: grid;
	grid-template: max-content var(--h)/ var(--w);
	overflow: hidden;
	position: relative;
	margin: 1em auto;
	width: var(--w);
	font-family: ubuntu mono, consolas, monaco, monospace;
	
	&::before, &::after {
		grid-column: 1/ span 2;
		grid-row: 2;
		border-radius: var(--r);
		box-shadow: inset 0 2px 3px rgba(#000, .3);
		background: #ccc;
		content: ''
	}
	
	&::after {
		/* non-standard WebKit version */
		-webkit-mask: var(--fill);
		-webkit-mask-composite: xor;
		/* standard version, supported in Firefox */
						mask: var(--fill);
						mask-composite: exclude;
		background: 
			linear-gradient(rgba(#fff, .3), rgba(#000, .3))
			#95a;
	}
}

.sr-only {
	position: absolute;
	clip-path: inset(50%)
}

input[type='range'] {
	&::-webkit-slider-runnable-track, 
	&::-webkit-slider-thumb, & {
		-webkit-appearance: none
	}
	
	grid-column: 1;
	grid-row: 2;
	z-index: 1;
	top: 0; left: 0;
	margin: 0;
	background: none; /* get rid of white Chrome background */
	color: #000;
	pointer-events: none;
	
	&::-webkit-slider-runnable-track { @include track }
	&::-moz-range-track { @include track }
	
	&::-webkit-slider-thumb { @include thumb }
	&::-moz-range-thumb { @include thumb }
	
	&:focus {
		z-index: 2;
		outline: solid 0 transparent;
		
		&, & + output { color: darkorange }
	}
}

output {
	position: absolute;
	right: 0;
	color: transparent;
	
	&::after {
		counter-reset: c var(--c);
		content: counter(c)
	}
}
              
            
!

JS

              
                addEventListener('input', e => {
  let _t = e.target;
  _t.parentNode.style.setProperty(`--${_t.id}`, +_t.value)
}, false);
              
            
!
999px

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