Gutter scroll areas
Five scroll areas with a visible track the thumb rides in: rail, groove, wide, inset and bordered. Each styles its own WebKit track and thumb with token colors, needs no global stylesheet, and is sized.
Installation
The styled layer is free and installs like any other ai2 component.
Run the following command
npx shadcn@latest add @ai2/scroll-area-gutterDependencies, the @ai2/tokens theme and the component file are installed together.
Copy the source
components/ui/scroll-area-gutter.tsx"use client"
import type * as React from "react"
import { cn } from "@/lib/utils"
/* Scroll-area gutter family: 5 decorative scroll areas. They draw a VISIBLE rail or gutter (track) for the scrollbar, and the thumb slides inside that rail. Track and thumb colours come ONLY from tokens (alpha via color-mix). size -> the viewport height. */
export type StyledSize = "sm" | "md" | "lg" | "xl"
const height: Record<StyledSize, string> = {
sm: "h-40",
md: "h-56",
lg: "h-72",
xl: "h-96",
}
const base = "w-full overflow-y-auto rounded-lg border border-border bg-surface-2 p-3"
/* Varsayilan icerik: kaydirmayi tetikleyecek kadar uzun, token-stilli satirlar. */
function DefaultRows({ count = 16 }: { count?: number }) {
return (
<div className="flex flex-col gap-2">
{Array.from({ length: count }).map((_, i) => (
<div
key={i}
className="flex items-center justify-between rounded-md border border-border bg-background px-3 py-2 text-sm text-foreground"
>
<span className="font-medium">Satir {i + 1}</span>
<span className="text-xs text-muted-foreground">token</span>
</div>
))}
</div>
)
}
type Props = {
className?: string
size?: StyledSize
children?: React.ReactNode
}
/* Rail: dolu, hap seklinde ray; thumb border-transparent + bg-clip-content ile iceride. */
export function RailScrollArea({ className, size = "md", children }: Props) {
return (
<div
data-slot="styled-scroll-area"
className={cn(
base,
height[size],
"[scrollbar-width:thin] [scrollbar-color:var(--color-border)_var(--color-surface-3)]",
"[&::-webkit-scrollbar]:w-3.5",
"[&::-webkit-scrollbar-track]:rounded-full [&::-webkit-scrollbar-track]:bg-[color-mix(in_oklab,var(--color-foreground)_6%,transparent)]",
"[&::-webkit-scrollbar-thumb]:rounded-full [&::-webkit-scrollbar-thumb]:border-[3px] [&::-webkit-scrollbar-thumb]:border-solid [&::-webkit-scrollbar-thumb]:border-transparent [&::-webkit-scrollbar-thumb]:bg-border [&::-webkit-scrollbar-thumb]:bg-clip-content",
className
)}
>
{children ?? <DefaultRows />}
</div>
)
}
/* Groove: cerceveli, oyuk goruntulu ray (border + ic bg); thumb dolu. */
export function GrooveScrollArea({ className, size = "md", children }: Props) {
return (
<div
data-slot="styled-scroll-area"
className={cn(
base,
height[size],
"[scrollbar-width:thin] [scrollbar-color:var(--color-border)_var(--color-surface-3)]",
"[&::-webkit-scrollbar]:w-3.5",
"[&::-webkit-scrollbar-track]:rounded-full [&::-webkit-scrollbar-track]:border [&::-webkit-scrollbar-track]:border-solid [&::-webkit-scrollbar-track]:border-border [&::-webkit-scrollbar-track]:bg-[color-mix(in_oklab,var(--color-foreground)_4%,transparent)]",
"[&::-webkit-scrollbar-thumb]:rounded-full [&::-webkit-scrollbar-thumb]:border-[3px] [&::-webkit-scrollbar-thumb]:border-solid [&::-webkit-scrollbar-thumb]:border-transparent [&::-webkit-scrollbar-thumb]:bg-border [&::-webkit-scrollbar-thumb]:bg-clip-content",
className
)}
>
{children ?? <DefaultRows />}
</div>
)
}
/* Wide: genis, belirgin ray + thumb. */
export function WideScrollArea({ className, size = "md", children }: Props) {
return (
<div
data-slot="styled-scroll-area"
className={cn(
base,
height[size],
"[scrollbar-width:auto] [scrollbar-color:var(--color-border)_var(--color-surface-3)]",
"[&::-webkit-scrollbar]:w-5",
"[&::-webkit-scrollbar-track]:rounded-full [&::-webkit-scrollbar-track]:bg-[color-mix(in_oklab,var(--color-foreground)_8%,transparent)]",
"[&::-webkit-scrollbar-thumb]:rounded-full [&::-webkit-scrollbar-thumb]:border-4 [&::-webkit-scrollbar-thumb]:border-solid [&::-webkit-scrollbar-thumb]:border-transparent [&::-webkit-scrollbar-thumb]:bg-[color-mix(in_oklab,var(--color-foreground)_35%,transparent)] [&::-webkit-scrollbar-thumb]:bg-clip-content",
className
)}
>
{children ?? <DefaultRows />}
</div>
)
}
/* Inset: the rail leaves a gap at the top and bottom (margin) and the thumb slides inside it. */
export function InsetScrollArea({ className, size = "md", children }: Props) {
return (
<div
data-slot="styled-scroll-area"
className={cn(
base,
height[size],
"[scrollbar-width:thin] [scrollbar-color:var(--color-border)_var(--color-surface-3)]",
"[&::-webkit-scrollbar]:w-3",
"[&::-webkit-scrollbar-track]:my-2 [&::-webkit-scrollbar-track]:rounded-full [&::-webkit-scrollbar-track]:bg-[color-mix(in_oklab,var(--color-foreground)_6%,transparent)]",
"[&::-webkit-scrollbar-thumb]:rounded-full [&::-webkit-scrollbar-thumb]:border-2 [&::-webkit-scrollbar-thumb]:border-solid [&::-webkit-scrollbar-thumb]:border-transparent [&::-webkit-scrollbar-thumb]:bg-border [&::-webkit-scrollbar-thumb]:bg-clip-content",
className
)}
>
{children ?? <DefaultRows />}
</div>
)
}
/* Bordered: ray seffaf, thumb token cerceveli (hollow-ish). */
export function BorderedScrollArea({ className, size = "md", children }: Props) {
return (
<div
data-slot="styled-scroll-area"
className={cn(
base,
height[size],
"[scrollbar-width:thin] [scrollbar-color:var(--color-border)_transparent]",
"[&::-webkit-scrollbar]:w-3.5",
"[&::-webkit-scrollbar-track]:rounded-full [&::-webkit-scrollbar-track]:bg-[color-mix(in_oklab,var(--color-foreground)_3%,transparent)]",
"[&::-webkit-scrollbar-thumb]:rounded-full [&::-webkit-scrollbar-thumb]:border [&::-webkit-scrollbar-thumb]:border-solid [&::-webkit-scrollbar-thumb]:border-border [&::-webkit-scrollbar-thumb]:bg-[color-mix(in_oklab,var(--color-foreground)_10%,transparent)]",
className
)}
>
{children ?? <DefaultRows />}
</div>
)
}Manual installs skip the @ai2/tokens theme, so add the token CSS from the theming guide or the tone colors will be missing.
Variations
5 takes on the same idea. Each is its own export, and every one accepts a size prop (sm, md, lg, xl) aligned to the base Button scale.
Rail
A filled, pill-shaped track with the thumb padded inside it.
import { RailScrollArea } from "@/components/ui/scroll-area-gutter"
<RailScrollArea />Groove
A bordered, grooved track with a filled thumb.
import { GrooveScrollArea } from "@/components/ui/scroll-area-gutter"
<GrooveScrollArea />Wide
A wide, prominent track and thumb.
import { WideScrollArea } from "@/components/ui/scroll-area-gutter"
<WideScrollArea />Inset
A track inset from the top and bottom with margin, thumb riding inside.
import { InsetScrollArea } from "@/components/ui/scroll-area-gutter"
<InsetScrollArea />Bordered
A faint track with a token-bordered, near-hollow thumb.
import { BorderedScrollArea } from "@/components/ui/scroll-area-gutter"
<BorderedScrollArea />ai2 Gutter scroll areas: 5 styled variations on the token system
The ai2 Gutter scroll areas are a set of 5 decorative button variations from the styled layer of the @ai2 design system, built around scroll containers with a visible padded track the thumb rides in. They are free and MIT licensed, and every color comes from a semantic token, so they theme with the rest of ai2 in light and dark.
Motion runs on framer-motion: the track and thumb styling is pure CSS; no motion library work is required. The styled layer is opt-in, so the dependency only lands if you use it; the base components stay lean. Under reduced motion, nothing animates; the areas still scroll and still show the track.
What is in the ai2 Gutter scroll areas?
5 exports in one file: Rail, Groove, Wide, Inset and Bordered. Each renders a native button and takes a size prop (sm, md, lg, xl) aligned to the base Button. They are separate from the base Button on purpose: the base keeps its clean variant, tone and size axes, while the styled layer carries the effects.
You own the file. Copy the one category file and you have all 5 variations, with no runtime dependency on ai2 itself.
Why use it
- On-system by construction: Every color resolves to an ai2 semantic token, so the buttons follow your theme in light and dark with no extra work.
- Effect without the sprawl: The decorations live in a dedicated styled file, so the base Button keeps its clean, predictable API.
- Accessible and honest: Each renders a real button element, keeps a visible focus ring, and respects prefers-reduced-motion.
Features
- Token-driven color: No hardcoded hex or oklch; the look recolors with your theme tokens.
- framer-motion: the track and thumb styling is pure CSS; no motion library work is required.
- Reduced-motion aware: Under prefers-reduced-motion, nothing animates; the areas still scroll and still show the track.
- Size aligned to the base: Every variation takes sm, md, lg and xl matching the base Button height scale, so styled and base buttons line up in a row.
Production tips
- Use it for emphasis, not everywhere: Styled buttons draw the eye. Reserve them for the one action you want people to take on a screen, and use the base Button for the rest.
- Keep labels as verbs: The decoration adds weight, so a clear action label keeps the button scannable.
- Pick one variation per surface: The variations share a family; using two different ones in the same view competes for attention.
Works with the rest of ai2
The Gutter scroll areas sit alongside the base Button and the rest of the @ai2 registry. They share the same token file, so a styled action next to a base button or a badge stays visually consistent in both modes.