Accent resizables
Five resizable splits with a primary-colored handle that highlights while dragging: a stretching bar, a glowing bar, a filling ring knob, a solid-fill track and lit panel edges. Each is self-contained (no panel library), drags with the pointer, is keyboard-adjustable via a role=separator handle, and is sized.
ResizableAccent
Installation
The styled layer is free and installs like any other ai2 component.
Run the following command
npx shadcn@latest add @ai2/resizable-accentDependencies, the @ai2/tokens theme and the component file are installed together.
Install dependencies
npm install motionCopy the source
components/ui/resizable-accent.tsxTS
"use client"
import * as React from "react"
import { motion, useReducedMotion } from "motion/react"
import { cn } from "@/lib/utils"
/* Accent resizable family: 5 self-contained split panels (NO panel library, NO
radix). The theme idea: a primary-colored handle that glows / stands out while
dragging (the dragging state). Each export holds an internal percentage (pct)
state; the separator is dragged with the pointer and adjusted with the arrow
keys. Deterministic (no Date.now / Math.random). The separator uses
role="separator" + aria-orientation + aria-valuenow/min/max, tabIndex=0. Color
comes ONLY from semantic tokens; alpha via color-mix or the Tailwind /NN. Where
there is motion it is gated on useReducedMotion() (in reduced the handle glow
falls back to an instant color transition). */
export type StyledSize = "sm" | "md" | "lg" | "xl"
type Orientation = "horizontal" | "vertical"
const height: Record<StyledSize, string> = {
sm: "h-40",
md: "h-56",
lg: "h-72",
xl: "h-96",
}
const MIN = 12
const MAX = 88
const clamp = (n: number) => Math.min(MAX, Math.max(MIN, n))
const focusRing =
"outline-none focus-visible:ring-[3px] focus-visible:ring-ring/50"
/* Ortak bolme mantigi: pct state + pointer/klavye tutamac handler'lari.
horizontal = sol/sag panel, dikey ayirici (yatay suruklenir).
vertical = ust/alt panel, yatay ayirici (dikey suruklenir). */
function useResizable(orientation: Orientation, initial = 50) {
const [pct, setPct] = React.useState(initial)
const containerRef = React.useRef<HTMLDivElement>(null)
const [dragging, setDragging] = React.useState(false)
const applyFromPoint = React.useCallback(
(clientX: number, clientY: number) => {
const el = containerRef.current
if (!el) return
const rect = el.getBoundingClientRect()
const raw =
orientation === "horizontal"
? ((clientX - rect.left) / rect.width) * 100
: ((clientY - rect.top) / rect.height) * 100
setPct(clamp(raw))
},
[orientation]
)
const onPointerDown = React.useCallback(
(e: React.PointerEvent<HTMLDivElement>) => {
e.preventDefault()
e.currentTarget.setPointerCapture(e.pointerId)
setDragging(true)
},
[]
)
const onPointerMove = React.useCallback(
(e: React.PointerEvent<HTMLDivElement>) => {
if (!e.currentTarget.hasPointerCapture(e.pointerId)) return
applyFromPoint(e.clientX, e.clientY)
},
[applyFromPoint]
)
const onPointerUp = React.useCallback(
(e: React.PointerEvent<HTMLDivElement>) => {
if (e.currentTarget.hasPointerCapture(e.pointerId))
e.currentTarget.releasePointerCapture(e.pointerId)
setDragging(false)
},
[]
)
const onKeyDown = React.useCallback(
(e: React.KeyboardEvent<HTMLDivElement>) => {
const dec = orientation === "horizontal" ? "ArrowLeft" : "ArrowUp"
const inc = orientation === "horizontal" ? "ArrowRight" : "ArrowDown"
if (e.key === dec) {
e.preventDefault()
setPct((p) => clamp(p - (e.shiftKey ? 10 : 2)))
} else if (e.key === inc) {
e.preventDefault()
setPct((p) => clamp(p + (e.shiftKey ? 10 : 2)))
} else if (e.key === "Home") {
e.preventDefault()
setPct(MIN)
} else if (e.key === "End") {
e.preventDefault()
setPct(MAX)
}
},
[orientation]
)
const separatorProps = {
role: "separator" as const,
"aria-orientation": (orientation === "horizontal" ? "vertical" : "horizontal") as
| "vertical"
| "horizontal",
"aria-valuenow": Math.round(pct),
"aria-valuemin": MIN,
"aria-valuemax": MAX,
tabIndex: 0,
onPointerDown,
onPointerMove,
onPointerUp,
onKeyDown,
}
return { pct, containerRef, dragging, separatorProps }
}
interface ResizableProps {
className?: string
size?: StyledSize
start?: React.ReactNode
end?: React.ReactNode
}
/* Varsayilan panel: token yuzeyli, ortalanmis etiket. */
function Pane({
label,
tone = "bg-surface-2",
className,
children,
}: {
label?: string
tone?: string
className?: string
children?: React.ReactNode
}) {
return (
<div
className={cn(
"flex h-full w-full items-center justify-center overflow-hidden p-4 text-sm font-medium text-foreground",
tone,
className
)}
>
{children ?? <span className="text-muted-foreground">{label}</span>}
</div>
)
}
const shell =
"flex w-full select-none overflow-hidden rounded-xl border border-border"
const spring = { type: "spring" as const, stiffness: 500, damping: 30 }
/* BarResizable: primary dikey cubuk; suruklerken opaklik/olcek artar. */
export function BarResizable({ className, size = "md", start, end }: ResizableProps) {
const { pct, containerRef, dragging, separatorProps } = useResizable("horizontal")
const reduce = useReducedMotion()
return (
<div data-slot="styled-resizable" ref={containerRef} className={cn(shell, height[size], className)}>
<div style={{ width: `${pct}%` }} className="h-full">
{start ?? <Pane label="Panel bir" tone="bg-surface-2" />}
</div>
<div
{...separatorProps}
className={cn(
"relative flex h-full w-1.5 shrink-0 cursor-col-resize items-center justify-center bg-border transition-colors",
focusRing,
"after:absolute after:inset-y-0 after:-inset-x-1 after:content-['']",
dragging ? "bg-primary/20" : "hover:bg-primary/15"
)}
>
<motion.span
aria-hidden="true"
className={cn("h-10 w-1 rounded-full", dragging ? "bg-primary" : "bg-primary/60")}
animate={reduce ? undefined : { scaleY: dragging ? 1.15 : 1 }}
transition={reduce ? { duration: 0 } : spring}
/>
</div>
<div style={{ width: `${100 - pct}%` }} className="h-full">
{end ?? <Pane label="Panel iki" tone="bg-surface-3" />}
</div>
</div>
)
}
/* GlowResizable: primary cubuk, suruklerken cevresine primary isik halesi (box-shadow) yayar. */
export function GlowResizable({ className, size = "md", start, end }: ResizableProps) {
const { pct, containerRef, dragging, separatorProps } = useResizable("horizontal")
const reduce = useReducedMotion()
return (
<div data-slot="styled-resizable" ref={containerRef} className={cn(shell, height[size], className)}>
<div style={{ width: `${pct}%` }} className="h-full">
{start ?? <Pane label="Panel bir" tone="bg-surface-2" />}
</div>
<div
{...separatorProps}
className={cn(
"relative flex h-full w-1.5 shrink-0 cursor-col-resize items-center justify-center",
focusRing,
"after:absolute after:inset-y-0 after:-inset-x-1 after:content-['']"
)}
>
<motion.span
aria-hidden="true"
className={cn(
"h-full w-1 rounded-full transition-shadow",
dragging
? "bg-primary shadow-[0_0_14px_2px_color-mix(in_oklab,var(--color-primary)_65%,transparent)]"
: "bg-primary/70 shadow-[0_0_0_0_color-mix(in_oklab,var(--color-primary)_0%,transparent)]"
)}
animate={reduce ? undefined : { scale: dragging ? 1.05 : 1 }}
transition={reduce ? { duration: 0 } : spring}
/>
</div>
<div style={{ width: `${100 - pct}%` }} className="h-full">
{end ?? <Pane label="Panel iki" tone="bg-surface-3" />}
</div>
</div>
)
}
/* RingResizable: ortada primary halkali yuvarlak tutamac; suruklerken ici primary ile dolar. */
export function RingResizable({ className, size = "md", start, end }: ResizableProps) {
const { pct, containerRef, dragging, separatorProps } = useResizable("horizontal")
const reduce = useReducedMotion()
return (
<div data-slot="styled-resizable" ref={containerRef} className={cn(shell, height[size], className)}>
<div style={{ width: `${pct}%` }} className="h-full">
{start ?? <Pane label="Panel bir" tone="bg-surface-2" />}
</div>
<div
{...separatorProps}
className={cn(
"relative flex h-full w-1 shrink-0 cursor-col-resize items-center justify-center bg-border transition-colors",
focusRing,
"after:absolute after:inset-y-0 after:-inset-x-1.5 after:content-['']",
dragging ? "bg-primary/40" : "hover:bg-primary/20"
)}
>
<motion.span
aria-hidden="true"
className={cn(
"z-10 size-4 rounded-full border-2 border-primary transition-colors",
dragging ? "bg-primary" : "bg-background"
)}
animate={reduce ? undefined : { scale: dragging ? 1.2 : 1 }}
transition={reduce ? { duration: 0 } : spring}
/>
</div>
<div style={{ width: `${100 - pct}%` }} className="h-full">
{end ?? <Pane label="Panel iki" tone="bg-surface-3" />}
</div>
</div>
)
}
/* FillResizable: a thin line; while dragging the whole rail fills with a primary tint. */
export function FillResizable({ className, size = "md", start, end }: ResizableProps) {
const { pct, containerRef, dragging, separatorProps } = useResizable("horizontal")
return (
<div data-slot="styled-resizable" ref={containerRef} className={cn(shell, height[size], className)}>
<div style={{ width: `${pct}%` }} className="h-full">
{start ?? <Pane label="Panel bir" tone="bg-surface-2" />}
</div>
<div
{...separatorProps}
className={cn(
"relative h-full w-2 shrink-0 cursor-col-resize transition-colors",
focusRing,
"after:absolute after:inset-y-0 after:-inset-x-1 after:content-['']",
dragging ? "bg-primary" : "bg-primary/25 hover:bg-primary/40"
)}
/>
<div style={{ width: `${100 - pct}%` }} className="h-full">
{end ?? <Pane label="Panel iki" tone="bg-surface-3" />}
</div>
</div>
)
}
/* EdgeResizable: a thin separator; while dragging the neighbouring panel edges light up with a primary line. */
export function EdgeResizable({ className, size = "md", start, end }: ResizableProps) {
const { pct, containerRef, dragging, separatorProps } = useResizable("horizontal")
return (
<div data-slot="styled-resizable" ref={containerRef} className={cn(shell, height[size], className)}>
<div
style={{ width: `${pct}%` }}
className={cn(
"h-full border-r-2 transition-colors",
dragging ? "border-primary" : "border-transparent"
)}
>
{start ?? <Pane label="Panel bir" tone="bg-surface-2" />}
</div>
<div
{...separatorProps}
className={cn(
"relative h-full w-px shrink-0 cursor-col-resize transition-colors",
focusRing,
"after:absolute after:inset-y-0 after:-inset-x-1.5 after:content-['']",
dragging ? "bg-primary" : "bg-border hover:bg-primary/50"
)}
/>
<div
style={{ width: `${100 - pct}%` }}
className={cn(
"h-full border-l-2 transition-colors",
dragging ? "border-primary" : "border-transparent"
)}
>
{end ?? <Pane label="Panel iki" tone="bg-surface-3" />}
</div>
</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.
Bar
A primary bar that brightens and stretches while dragging.
Panel bir
Panel iki
TS
import { BarResizable } from "@/components/ui/resizable-accent"
<BarResizable />Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
Glow
A primary bar that casts a primary glow while dragging.
Panel bir
Panel iki
TS
import { GlowResizable } from "@/components/ui/resizable-accent"
<GlowResizable />Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
Ring
A ringed knob at the center that fills with primary while dragging.
Panel bir
Panel iki
TS
import { RingResizable } from "@/components/ui/resizable-accent"
<RingResizable />Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
Fill
A thin track that fills solid primary while dragging.
Panel bir
Panel iki
TS
import { FillResizable } from "@/components/ui/resizable-accent"
<FillResizable />Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
Edge
The adjacent panel edges light up primary while dragging.
Panel bir
Panel iki
TS
import { EdgeResizable } from "@/components/ui/resizable-accent"
<EdgeResizable />Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
Panel bir
Panel iki
ai2 Accent resizables: 5 styled variations on the token system
The ai2 Accent resizables are a set of 5 decorative button variations from the styled layer of the @ai2 design system, built around draggable split panels with a primary handle that highlights on drag. 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: framer-motion springs the handle scale on drag; the drag itself is instant. The styled layer is opt-in, so the dependency only lands if you use it; the base components stay lean. Under reduced motion, the handle stays static and only shifts color; dragging still resizes the panels.
What is in the ai2 Accent resizables?
5 exports in one file: Bar, Glow, Ring, Fill and Edge. 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: framer-motion springs the handle scale on drag; the drag itself is instant.
- Reduced-motion aware: Under prefers-reduced-motion, the handle stays static and only shifts color; dragging still resizes the panels.
- 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 Accent resizables 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.