FANCYUI
Tune Slider — live readout
Show value
Sound
Esc to close
Why it works
The fill is a CSS variable written from the same value as the number, so the bar and the readout can never disagree, even mid-drag.
When to use it
Any numeric setting where the exact value matters.
Things to watch
A native range input underneath, so keyboard and screen readers work out of the box. The tick sound is opt-in and silent until the visitor enables sound.
Implementation clues
- native range
- CSS var fill
- tabular value
- sound tick