Banner alerts
Five edge-to-edge alert banners that drop the radius and read as page strips rather than cards: a top notice, an inline strip, a sticky blurred strip, a compact status line and a saturated bar. Each is sized, driven by a tone prop (info, success, warning, danger) and fully token-based.
AlertBanner
Installation
The styled layer is free and installs like any other ai2 component.
Run the following command
npx shadcn@latest add @ai2/alert-bannerDependencies, the @ai2/tokens theme and the component file are installed together.
Install dependencies
npm install lucide-reactCopy the source
components/ui/alert-banner.tsxTS
"use client"
import type * as React from "react"
import { CircleAlert, CircleCheck, Info, TriangleAlert } from "lucide-react"
import { cn } from "@/lib/utils"
/* Banner alert family: 5 decorative alert surfaces. The shared idea is an
EDGE-TO-EDGE strip - no radius (rounded-none), horizontal lines cross the full
width, and the surface reads as a page strip rather than a card. The variants
differ by where the strip sits on the page (top, in the flow, sticky,
compressed, solid bar). Colour comes ONLY from semantic tokens; alpha via
color-mix or the tailwind opacity modifier. Anatomy (Berkay's decision): the
icon marks the TITLE ROW ONLY - icon and title share line 1, the description
starts BELOW the icon and takes the full width. No motion, this family is
entirely static. */
export type StyledSize = "sm" | "md" | "lg" | "xl"
export type StyledTone = "info" | "success" | "warning" | "danger"
const pad: Record<StyledSize, string> = {
sm: "p-3 text-sm",
md: "p-4 text-sm",
lg: "p-4 text-base",
xl: "p-5 text-base",
}
/* Compact uses its own narrower scale - the strip stays close to a single line. */
const padCompact: Record<StyledSize, string> = {
sm: "px-3 py-1.5 text-sm",
md: "px-4 py-2 text-sm",
lg: "px-5 py-2.5 text-base",
xl: "px-6 py-3 text-base",
}
/* Grid: icon column plus content. The icon is a direct child, so the
[&>svg] / [&>i] pair (lucide <svg> and remixicon <i> compatibility) lives
here. Because this is a strip, rounded-none is baked into the base. */
const base =
"relative grid w-full grid-cols-[calc(var(--spacing)*4)_1fr] items-start gap-x-2 gap-y-0.5 rounded-none [&>svg]:size-4 [&>svg]:shrink-0 [&>svg]:translate-y-0.5 [&>i]:block [&>i]:size-4 [&>i]:shrink-0 [&>i]:translate-y-0.5 [&>i]:text-base [&>i]:leading-none"
/* Tone -> varsayilan lucide ikon. */
const toneIcon: Record<StyledTone, React.ReactNode> = {
info: <Info />,
success: <CircleCheck />,
warning: <TriangleAlert />,
danger: <CircleAlert />,
}
/* Icon colour comes from the root; the [&>i] pair is required for remixicon
compatibility. */
const iconTone: Record<StyledTone, string> = {
info: "[&>svg]:text-info [&>i]:text-info",
success: "[&>svg]:text-success [&>i]:text-success",
warning: "[&>svg]:text-warning-soft-foreground [&>i]:text-warning-soft-foreground",
danger: "[&>svg]:text-danger [&>i]:text-danger",
}
type AlertProps = Omit<React.ComponentProps<"div">, "title"> & {
size?: StyledSize
tone?: StyledTone
title?: React.ReactNode
icon?: React.ReactNode
}
/* Shared shell: the surface and the size map are supplied from outside. */
function Frame({
size,
tone,
title,
icon,
children,
className,
surface,
scale = pad,
...props
}: Omit<AlertProps, "size" | "tone"> & {
size: StyledSize
tone: StyledTone
surface: string
scale?: Record<StyledSize, string>
}) {
return (
<div
data-slot="styled-alert"
data-tone={tone}
role="alert"
className={cn(base, scale[size], surface, className)}
{...props}
>
{icon ?? toneIcon[tone]}
<div
data-slot="styled-alert-title"
className="col-start-2 min-h-4 font-medium tracking-tight"
>
{title}
</div>
<div
data-slot="styled-alert-description"
className="col-span-2 col-start-1 text-sm opacity-90 [&_p]:leading-relaxed"
>
{children}
</div>
</div>
)
}
/* A soft tone ground plus a tone underline. Top, Sticky and Compact share
this. */
const softTone: Record<StyledTone, string> = {
info: "bg-info-soft text-info-soft-foreground border-info/40",
success: "bg-success-soft text-success-soft-foreground border-success/40",
warning: "bg-warning-soft text-warning-soft-foreground border-warning/50",
danger: "bg-danger-soft text-danger-soft-foreground border-danger/40",
}
/* Top: an announcement strip pinned to the very top of the page - underline
only. */
export function TopAlert({
className,
size = "md",
tone = "info",
title = "Heads up",
children = "A page-top notice strip with a single bottom rule.",
icon,
...props
}: AlertProps) {
return (
<Frame
size={size}
tone={tone}
title={title}
icon={icon}
surface={cn("border-b", softTone[tone])}
className={className}
{...props}
>
{children}
</Frame>
)
}
/* Inline: a neutral strip dropped into the middle of the content flow - a line
above and below, colour only in the icon. */
export function InlineAlert({
className,
size = "md",
tone = "info",
title = "Heads up",
children = "A neutral strip that sits inside the content flow.",
icon,
...props
}: AlertProps) {
return (
<Frame
size={size}
tone={tone}
title={title}
icon={icon}
surface={cn("border-y border-border bg-surface-2 text-foreground", iconTone[tone])}
className={className}
{...props}
>
{children}
</Frame>
)
}
/* Sticky: a strip that sticks to the top on scroll. Semi-transparent plus a
backdrop blur so the content underneath stays readable; falls back to an
opaque soft ground where blur is unsupported. */
const stickyTone: Record<StyledTone, string> = {
info: "bg-info-soft/85 text-info-soft-foreground border-info/40 supports-[backdrop-filter]:bg-info-soft/60",
success:
"bg-success-soft/85 text-success-soft-foreground border-success/40 supports-[backdrop-filter]:bg-success-soft/60",
warning:
"bg-warning-soft/85 text-warning-soft-foreground border-warning/50 supports-[backdrop-filter]:bg-warning-soft/60",
danger:
"bg-danger-soft/85 text-danger-soft-foreground border-danger/40 supports-[backdrop-filter]:bg-danger-soft/60",
}
export function StickyAlert({
className,
size = "md",
tone = "info",
title = "Heads up",
children = "A strip that sticks to the top of its scroll container.",
icon,
...props
}: AlertProps) {
return (
<Frame
size={size}
tone={tone}
title={title}
icon={icon}
surface={cn(
"sticky top-0 z-10 border-b supports-[backdrop-filter]:backdrop-blur-md",
stickyTone[tone]
)}
className={className}
{...props}
>
{children}
</Frame>
)
}
/* Compact: the narrowest strip - for persistent displays such as system
status. */
export function CompactAlert({
className,
size = "md",
tone = "info",
title = "Heads up",
children = "The tightest strip, sized for persistent status.",
icon,
...props
}: AlertProps) {
return (
<Frame
size={size}
tone={tone}
title={title}
icon={icon}
scale={padCompact}
surface={cn("border-y", softTone[tone])}
className={className}
{...props}
>
{children}
</Frame>
)
}
/* Bar: a solid tone bar. The loudest member of the strip family; text and icon
come from tone -foreground. */
const barTone: Record<StyledTone, string> = {
info: "bg-info text-info-foreground",
success: "bg-success text-success-foreground",
warning: "bg-warning text-warning-foreground",
danger: "bg-danger text-danger-foreground",
}
export function BarAlert({
className,
size = "md",
tone = "info",
title = "Heads up",
children = "A saturated edge-to-edge bar in the solid tone.",
icon,
...props
}: AlertProps) {
return (
<Frame
size={size}
tone={tone}
title={title}
icon={icon}
surface={barTone[tone]}
className={className}
{...props}
>
{children}
</Frame>
)
}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.
Top
A page-top notice strip with one bottom rule.
Heads up
A page-top notice strip with a single bottom rule.
TS
import { TopAlert } from "@/components/ui/alert-banner"
<TopAlert tone="info" title="Heads up">A page-top notice strip with a single bottom rule.</TopAlert>Heads up
A page-top notice strip with a single bottom rule.
Heads up
A page-top notice strip with a single bottom rule.
Heads up
A page-top notice strip with a single bottom rule.
Heads up
A page-top notice strip with a single bottom rule.
Inline
A neutral strip with rules above and below; color stays in the icon.
Synced
A neutral strip that sits inside the content flow.
TS
import { InlineAlert } from "@/components/ui/alert-banner"
<InlineAlert tone="success" title="Synced">A neutral strip that sits inside the content flow.</InlineAlert>Synced
A neutral strip that sits inside the content flow.
Synced
A neutral strip that sits inside the content flow.
Synced
A neutral strip that sits inside the content flow.
Synced
A neutral strip that sits inside the content flow.
Sticky
A translucent, blurred strip that sticks to the top of its scroll container.
Offline
A translucent strip that sticks to the top on scroll.
TS
import { StickyAlert } from "@/components/ui/alert-banner"
<StickyAlert tone="warning" title="Offline">A translucent strip that sticks to the top on scroll.</StickyAlert>Offline
A translucent strip that sticks to the top on scroll.
Offline
A translucent strip that sticks to the top on scroll.
Offline
A translucent strip that sticks to the top on scroll.
Offline
A translucent strip that sticks to the top on scroll.
Compact
The tightest strip, on its own compact scale.
Beta
The tightest strip, sized for persistent status.
TS
import { CompactAlert } from "@/components/ui/alert-banner"
<CompactAlert tone="info" title="Beta">The tightest strip, sized for persistent status.</CompactAlert>Beta
The tightest strip, sized for persistent status.
Beta
The tightest strip, sized for persistent status.
Beta
The tightest strip, sized for persistent status.
Beta
The tightest strip, sized for persistent status.
Bar
A saturated solid tone bar, the loudest banner.
Incident
A saturated edge-to-edge bar in the solid tone.
TS
import { BarAlert } from "@/components/ui/alert-banner"
<BarAlert tone="danger" title="Incident">A saturated edge-to-edge bar in the solid tone.</BarAlert>Incident
A saturated edge-to-edge bar in the solid tone.
Incident
A saturated edge-to-edge bar in the solid tone.
Incident
A saturated edge-to-edge bar in the solid tone.
Incident
A saturated edge-to-edge bar in the solid tone.
ai2 Banner alerts: 5 styled variations on the token system
The ai2 Banner alerts are a set of 5 decorative button variations from the styled layer of the @ai2 design system, built around edge-to-edge alert strips with no radius. 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: there is no motion in this family; every variation is static. The styled layer is opt-in, so the dependency only lands if you use it; the base components stay lean. Under reduced motion, nothing changes, because the banners never move.
What is in the ai2 Banner alerts?
5 exports in one file: Top, Inline, Sticky, Compact and Bar. 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: there is no motion in this family; every variation is static.
- Reduced-motion aware: Under prefers-reduced-motion, nothing changes, because the banners never move.
- 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 Banner alerts 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.