Roller

This is a lightweight JavaScript library that makes it easy to create smooth, touch-friendly scrolling experiences on mobile devices. When you swipe or drag on a list or carousel, it doesn't just stop dead—it has momentum, so it continues sliding a bit further, just like swiping on a real phone. It also snaps to pages when you reach the end, with a bouncy elastic effect that feels natural.

At its core, the library handles the math behind touch interactions. When someone swipes on your mobile site or app, it tracks their finger movement, calculates how fast they were moving, and lets the scroll continue with that momentum. If they swipe past the last item, instead of just cutting off, the content bounces back elastically—like pulling a rubber band and letting it snap. The library manages all these physics calculations so you don't have to code them yourself.

You'd use this if you're building a mobile-friendly interface with horizontal or vertical scrolling lists—think image galleries, product carousels, or date pickers. Any time you want your users to feel like they're interacting with a native app rather than a website, momentum and elastic scrolling make a big difference. A e-commerce site might use it for browsing product categories, or a news app might use it for swiping between articles. It's specifically built for one-dimensional scrolling (meaning left-right or up-down, not both at once), which keeps it simple and performant.

The README provided doesn't include detailed documentation, so you'd need to check the actual code or project page to see exact usage examples and available options. The library is quite minimal—just 5 stars suggests it's a smaller, more niche project rather than a mainstream choice—but it does exactly what it promises: handles the touchy, momentum-driven scrolling part of your interface so you can focus on the rest of your design.