Sadly, the slider-thumb/slider-track pseudo-element selectors haven't been standardized yet. There are prefixed selectors available for all the major rendering

Sadly, the slider-thumb/slider-track pseudo-element selectors haven't been standardized yet. There are prefixed selectors available for all the major rendering engines, but we were only targeting webkit-based browsers (more specifically, we were building for a webkit-based web view in a Xamarin app for iOS and Android). CSS-Tricks has a good writeup if you're interested: https://css-tricks.com/styling-cross-browser-compatible-range-inputs-css/ https://css-tricks.com/styling-cross-browser-compatible-rang...