Webform noUiSlider element is a lightweight range slider with multi-touch support and a ton of features. It supports non-linear ranges, requires no external dependencies, has keyboard support, and it works great in responsive designs.

noUiSlider: lightweight JavaScript range slider with full touch support
Multi-Touch support for iOS, Android & Windows (phone)
Accessible with ARIA and keyboard support
Responsive design-friendly
No dependencies
Tested in IE9 - IE11, Edge, Chrome, Firefox & Safari