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CSS

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HTML 

              
                <p>Track's <code>border-box</code> perfectly fits within slider's <code>content-box</code>. Thumb moves within the limits of the <code>input</code> element's <code>content-box</code> in Firefox and Edge and within the limits of the track's <code>content-box</code> in Chrome.</p>
<input type='range' value='0'/>
<p>Track's <code>border-box</code> is set to be longer than slider's <code>content-box</code> (Chrome doesn't allow this and Edge cuts it off). Thumb still moves within the limits of the <code>input</code> element's <code>content-box</code> in Firefox and Edge, even though the track width is now different.</p>
<input type='range' value='0'/>
<p>Track's <code>border-box</code> is set to be shorter than slider's <code>content-box</code> (Chrome doesn't allow this). Thumb still moves within the limits of the <code>input</code> element's <code>content-box</code> in Firefox and Edge, even though the track width is now different.</p>
<input type='range' value='0'/>
<p>Track is scaled horizontally to be longer than slider (Edge cuts it off). In Edge, the thumb now moves within an interval the size of the track's <code>border-box</code>, but starting from the left <code>padding</code> limit.</p>
<input type='range' value='0'/>
<p>Track is scaled horizontally to be shorter than slider. In Edge, the thumb now moves within an interval the size of the track's <code>border-box</code>, but starting from the left <code>padding</code> limit.</p>
<input type='range' value='0'/>
<p>The track gets a negative lateral <code>margin</code>. Thumb still moves within the limits of the <code>input</code> element's <code>content-box</code> in Firefox, even though the track is now longer.</p>
<input type='range' value='0'/>
<p>The track gets a positive lateral <code>margin</code>. Thumb still moves within the limits of the <code>input</code> element's <code>content-box</code> in Firefox, even though the track is now shorter.</p>
<input type='range' value='0'/>
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CSS 

              
                @mixin highlight-boxes($c: #f90) {
	box-sizing: border-box;
	border: solid .5em currentcolor;
	padding: .5em;
	background: currentcolor content-box;
	color: rgba($c, .65);
}

@mixin track() {
	height: 3em;
	@include highlight-boxes(#b53)
}

@mixin track-long {
	width: 35em;
}

@mixin track-short {
	width: 15em;
}

@mixin track-scaleup {
	transform: scaleX(2)
}

@mixin track-scaledw {
	transform: scaleX(.5)
}

@mixin track-marg-out {
	margin: 0 -5em
}

@mixin track-marg-inn {
	margin: 0 5em
}

@mixin thumb() {
	width: 4.5em; height: 4.5em;
	border-radius: 0;
	@include highlight-boxes(#95a)
}

p {
	font: 1em/1.65 trebuchet ms, tahoma, sans-serif;
}

code {
	display: inline-block;
	padding: 2px .25em;
	border-radius: 3px;
	background: #ddd;
	font: 1em consolas, monaco, monospace
}

input {
	&, &::-webkit-slider-thumb {
		-webkit-appearance: none
	}
	
	margin: .25em auto;
	display: block;
	width: 25em; height: 5em;
	@include highlight-boxes;
	font: 1em arial sans-serif;
	
	&::-webkit-slider-runnable-track {
		@include track()
	}
	&::-moz-range-track {
		@include track()
	}
	&::-ms-track {
		@include track()
	}
	
	&::-webkit-slider-thumb {
		margin-top: -1.75em;
		@include thumb()
	}
	&::-moz-range-thumb {
		@include thumb()
	}
	&::-ms-thumb {
		margin-top: 0;
		@include thumb()
	}
	
	&:nth-of-type(2) {
		&::-webkit-slider-runnable-track {
			@include track-long()
		}
		&::-moz-range-track {
			@include track-long()
		}
		&::-ms-track {
			@include track-long()
		}
	}
	
	&:nth-of-type(3) {
		&::-webkit-slider-runnable-track {
			@include track-short()
		}
		&::-moz-range-track {
			@include track-short()
		}
		&::-ms-track {
			@include track-short()
		}
	}
	
	&:nth-of-type(4) {
		&::-webkit-slider-runnable-track {
			@include track-scaleup()
		}
		&::-moz-range-track {
			@include track-scaleup()
		}
		&::-ms-track {
			@include track-scaleup()
		}
	}
	
	&:nth-of-type(5) {
		&::-webkit-slider-runnable-track {
			@include track-scaledw()
		}
		&::-moz-range-track {
			@include track-scaledw()
		}
		&::-ms-track {
			@include track-scaledw()
		}
	}
	
	&:nth-of-type(6) {
		&::-webkit-slider-runnable-track {
			@include track-marg-out()
		}
		&::-moz-range-track {
			@include track-marg-out()
		}
		&::-ms-track {
			@include track-marg-out()
		}
	}
	
	&:nth-of-type(7) {
		&::-webkit-slider-runnable-track {
			@include track-marg-inn()
		}
		&::-moz-range-track {
			@include track-marg-inn()
		}
		&::-ms-track {
			@include track-marg-inn()
		}
	}
}
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JS
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