Areia

A popup that appears when a user hovers or focuses on an element, supporting interactive content.

Areia's HoverCard is built on @areia/slots/hover-card and rendered as an Ilha island when you use HoverCard. It handles hover/focus interactions, warm-up behavior between nearby hover-cards, collision-aware positioning, Escape dismissal, and accessible hover-card attributes.

import ilha from "ilha";
import { CalendarDays } from "lucide";
import { Button, Icon, HoverCard } from "areia";

export default ilha.render(() => (
  <HoverCard
    content={
      <div class="flex w-64 flex-col gap-2">
        <HoverCard.Title>Upcoming release</HoverCard.Title>
        <HoverCard.Description>
          The next major version ships with improved performance
          and new primitives.
        </HoverCard.Description>
      </div>
    }
  >
    <Button
      shape="square"
      icon={<Icon icon={CalendarDays} />}
      aria-label="Release notes"
    />
  </HoverCard>
));

Import

import { HoverCard } from "areia";

Usage

Call HoverCard(...) for an interactive island. The root renders the hover-card markup and initializes the @areia/slots/hover-card controller after mount.

import ilha from "ilha";
import { Button, HoverCard } from "areia";

export default ilha.render(() => (
  <HoverCard
    content={
      <div class="flex flex-col gap-1">
        <HoverCard.Title>Pro tip</HoverCard.Title>
        <HoverCard.Description>
          Hover cards are great for previewing content without a
          click.
        </HoverCard.Description>
      </div>
    }
  >
    <Button>Hover me</Button>
  </HoverCard>
));

For static server-rendered markup or custom initialization, use HoverCard.Static(...). For most application usage, call HoverCard(...).

Examples

Use content for the popup and children for the trigger content.

import ilha from "ilha";
import { Info } from "lucide";
import { Button, Icon, HoverCard } from "areia";

export default ilha.render(() => (
  <HoverCard
    content={
      <div class="flex flex-col gap-1">
        <HoverCard.Title>Did you know?</HoverCard.Title>
        <HoverCard.Description>
          Hover cards support interactive content inside the
          popup.
        </HoverCard.Description>
      </div>
    }
  >
    <Button
      variant="secondary"
      shape="square"
      icon={<Icon icon={Info} />}
      aria-label="More information"
    />
  </HoverCard>
));

Text Trigger

When the trigger is not an action, render it as a span.

Areia

import ilha from "ilha";
import { HoverCard } from "areia";

export default ilha.render(() => (
  <HoverCard
    triggerAs="span"
    triggerClass="underline decoration-dotted underline-offset-4"
    content={
      <div class="flex flex-col gap-1">
        <HoverCard.Title>Areia</HoverCard.Title>
        <HoverCard.Description>
          A vanilla TypeScript component library built for Astro
          and Ilha.
        </HoverCard.Description>
      </div>
    }
  >
    Areia
  </HoverCard>
));

Multiple HoverCards

HoverCards share warm-up behavior automatically. After one hover-card closes, hovering another within skipDelayDuration opens it without the normal delay.

import ilha from "ilha";
import { CalendarDays, Mail, User } from "lucide";
import { Button, Icon, HoverCard } from "areia";

export default ilha.render(() => (
  <div class="flex items-center gap-2">
    <HoverCard
      content={
        <div class="flex flex-col gap-1">
          <HoverCard.Title>Calendar</HoverCard.Title>
          <HoverCard.Description>
            View upcoming events.
          </HoverCard.Description>
        </div>
      }
    >
      <Button
        shape="square"
        icon={<Icon icon={CalendarDays} />}
        aria-label="Calendar"
      />
    </HoverCard>
    <HoverCard
      content={
        <div class="flex flex-col gap-1">
          <HoverCard.Title>Messages</HoverCard.Title>
          <HoverCard.Description>
            Check your inbox.
          </HoverCard.Description>
        </div>
      }
    >
      <Button
        shape="square"
        icon={<Icon icon={Mail} />}
        aria-label="Messages"
      />
    </HoverCard>
    <HoverCard
      content={
        <div class="flex flex-col gap-1">
          <HoverCard.Title>Profile</HoverCard.Title>
          <HoverCard.Description>
            Manage your account.
          </HoverCard.Description>
        </div>
      }
    >
      <Button
        shape="square"
        icon={<Icon icon={User} />}
        aria-label="Profile"
      />
    </HoverCard>
  </div>
));

Side

Use side to choose the preferred side of the trigger. Collision handling may flip the hover-card at runtime when there is not enough space.

import ilha from "ilha";
import { Button, HoverCard } from "areia";

export default ilha.render(() => (
  <div class="grid grid-cols-2 gap-3">
    <HoverCard
      side="top"
      content={
        <HoverCard.Description>
          Top hover-card
        </HoverCard.Description>
      }
    >
      <Button>Top</Button>
    </HoverCard>
    <HoverCard
      side="bottom"
      content={
        <HoverCard.Description>
          Bottom hover-card
        </HoverCard.Description>
      }
    >
      <Button>Bottom</Button>
    </HoverCard>
    <HoverCard
      side="left"
      content={
        <HoverCard.Description>
          Left hover-card
        </HoverCard.Description>
      }
    >
      <Button>Left</Button>
    </HoverCard>
    <HoverCard
      side="right"
      content={
        <HoverCard.Description>
          Right hover-card
        </HoverCard.Description>
      }
    >
      <Button>Right</Button>
    </HoverCard>
  </div>
));

Alignment

Use align to align the hover-card along the selected side.

import ilha from "ilha";
import { Button, HoverCard } from "areia";

export default ilha.render(() => (
  <div class="flex items-center gap-3">
    <HoverCard
      align="start"
      content={
        <HoverCard.Description>
          Start aligned
        </HoverCard.Description>
      }
    >
      <Button>Start</Button>
    </HoverCard>
    <HoverCard
      align="center"
      content={
        <HoverCard.Description>
          Center aligned
        </HoverCard.Description>
      }
    >
      <Button>Center</Button>
    </HoverCard>
    <HoverCard
      align="end"
      content={
        <HoverCard.Description>
          End aligned
        </HoverCard.Description>
      }
    >
      <Button>End</Button>
    </HoverCard>
  </div>
));

Delay Control

Use delay to control how long to wait before opening. Use closeDelay to control how long to wait before closing after leaving. Use skipDelayDuration to control the warm-up window after a hover-card closes.

import ilha from "ilha";
import { Button, HoverCard } from "areia";

export default ilha.render(() => (
  <div class="flex flex-wrap items-center gap-3">
    <HoverCard
      delay={1000}
      content={
        <HoverCard.Description>
          Opens after one second
        </HoverCard.Description>
      }
    >
      <Button>1s delay</Button>
    </HoverCard>
    <HoverCard
      delay={0}
      closeDelay={0}
      skipDelayDuration={0}
      content={
        <HoverCard.Description>
          Opens and closes instantly with no warm-up window
        </HoverCard.Description>
      }
    >
      <Button>Instant</Button>
    </HoverCard>
  </div>
));

Custom Content

The content prop accepts markup. HoverCards are designed for richer content than tooltips.

import ilha from "ilha";
import { Button, HoverCard } from "areia";

export default ilha.render(() => (
  <HoverCard
    content={
      <div class="flex flex-col gap-3">
        <div class="flex items-center gap-3">
          <div class="flex size-9 items-center justify-center rounded-full bg-areia-surface-muted text-sm font-medium">
            JD
          </div>
          <div>
            <HoverCard.Title>Jane Doe</HoverCard.Title>
            <HoverCard.Description>
              Product Designer
            </HoverCard.Description>
          </div>
        </div>
        <div class="flex gap-2">
          <Button size="sm">Follow</Button>
        </div>
      </div>
    }
  >
    <Button>User preview</Button>
  </HoverCard>
));

Custom Trigger

Use trigger when you need complete control over the trigger markup. The custom trigger must include data-slot="hover-card-trigger".

import ilha from "ilha";
import { HoverCard } from "areia";

export default ilha.render(() => (
  <HoverCard
    content="Custom trigger markup"
    trigger={
      <span
        data-slot="hover-card-trigger"
        tabindex="0"
        class="inline-flex rounded-full bg-areia-surface-muted px-2 py-1 text-sm text-areia-default"
      >
        Beta
      </span>
    }
  />
));

Static Composition

Use low-level parts for static markup or when you want to call createHoverCard yourself.

Hover me

import ilha from "ilha";
import { HoverCard } from "areia";

export default ilha.render(() => (
  <HoverCard.Static
    content="Static hover-card markup"
    triggerAs="span"
  >
    Hover me
  </HoverCard.Static>
));

	Tooltip	HoverCard
Purpose	Short, non-interactive labels	Rich preview content with interaction
Content	Brief text	Links, buttons, avatars, custom layouts
Trigger	Hover or focus	Hover or focus
ARIA	`role="tooltip"`	`aria-haspopup="dialog"`
Focus	Does not move focus into popup	Does not move focus into popup
Delay	300ms default	700ms default

Use Tooltip to label an icon button or add a short explanation. Use HoverCard when you want to show richer preview content on hover.

API Reference

HoverCard is an Ilha island. It accepts standard HTML div attributes plus @areia/slots/hover-card options.

Prop	Type	Default	Description
`content`	`unknown`	-	Content to display inside the hover-card popup.
`children`	`unknown`	-	Trigger content when `trigger` is not provided.
`trigger`	`unknown`	-	Custom trigger markup. Must include `data-slot="hover-card-trigger"`.
`triggerAs`	`"button" \| "span" \| "div" \| "a"`	`"span"`	Tag used for the generated trigger.
`class`	`string`	-	Additional CSS classes applied to the hover-card root.
`className`	`string`	-	Alias for `class`.
`triggerClass`	`string`	-	Additional CSS classes applied to the generated trigger.
`triggerClassName`	`string`	-	Alias for `triggerClass`.
`contentClass`	`string`	-	Additional CSS classes applied to the hover-card popup.
`contentClassName`	`string`	-	Alias for `contentClass`.
`side`	`"top" \| "right" \| "bottom" \| "left"`	`"bottom"`	Preferred side relative to the trigger.
`align`	`"start" \| "center" \| "end"`	`"center"`	Preferred alignment along the selected side.
`sideOffset`	`number`	`4`	Distance from the trigger in pixels.
`alignOffset`	`number`	`0`	Offset from the aligned edge in pixels.
`avoidCollisions`	`boolean`	`true`	Flip or shift to stay inside the viewport.
`collisionPadding`	`number`	`8`	Viewport edge padding used for collision handling.
`delay`	`number`	`700`	Delay before showing the hover-card in milliseconds.
`closeDelay`	`number`	`300`	Delay before closing after mouse leave in milliseconds.
`skipDelayDuration`	`number`	`300`	Warm-up window where another hover-card opens without delay. Set `0` to disable.
`portal`	`boolean`	`true`	Portal content to `document.body` while open.
`closeOnClickOutside`	`boolean`	`true`	Close when clicking outside the hover-card.
`closeOnEscape`	`boolean`	`true`	Close when pressing Escape.
`onOpenChange`	`(open: boolean) => void`	-	Called when visibility changes.
`onPortalMounted`	`(container: HTMLElement) => void`	-	After portaled content mounts on open. See Dialog docs, Ilha + portaled overlays.

HoverCard.Trigger

Generated trigger element.

Prop	Type	Default	Description
`as`	`"button" \| "span" \| "div" \| "a"`	`"span"`	Trigger tag name.
`children`	`unknown`	-	Trigger content.
`class`	`string`	-	Additional CSS classes.
`className`	`string`	-	Alias for `class`.

HoverCard.Content

Popup container.

Prop	Type	Default	Description
`children`	`unknown`	-	HoverCard content.
`side`	`"top" \| "right" \| "bottom" \| "left"`	`"bottom"`	Preferred side styling.
`class`	`string`	-	Additional CSS classes.
`className`	`string`	-	Alias for `class`.

HoverCard.Title

Renders an h3 styled for hover-card headings.

Prop	Type	Default	Description
`children`	`unknown`	-	Title content.
`class`	`string`	-	Additional CSS classes.
`className`	`string`	-	Alias for `class`.

HoverCard.Description

Renders a subdued paragraph.

Prop	Type	Default	Description
`children`	`unknown`	-	Description content.
`class`	`string`	-	Additional CSS classes.
`className`	`string`	-	Alias for `class`.

Accessibility

Behavior

Opens on pointer hover for mouse/pen input after a delay.
Opens on keyboard focus after a delay.
Touch hover is ignored; touch devices use focus behavior.
Pressing Escape hides the hover-card.
Moving from the trigger to the hover-card content keeps it open.
Disabled triggers do not open hover-cards.
The popup can contain interactive content and remains open while the user interacts with it.

ARIA

The controller automatically handles:

aria-haspopup="dialog" on the trigger.
aria-controls linking the trigger to the content.
aria-expanded on the trigger.
Stable generated IDs for content when needed.

Trigger Labels

HoverCards are supplemental. Icon-only triggers still need an accessible name, usually with aria-label on the trigger button.

Hover Card

Upcoming release

Import

Usage

Pro tip

Examples

Basic HoverCard

Did you know?