Hover Card

For sighted users to preview content available behind a link.

import React from 'react';
import * as HoverCard from '@radix-ui/react-hover-card';
import './styles.css';

const HoverCardDemo = () => (
  <HoverCard.Root>
    <HoverCard.Trigger asChild>
      <a
        className="ImageTrigger"
        href="https://twitter.com/radix_ui"
        target="_blank"
        rel="noreferrer noopener"
      >
        <img
          className="Image normal"
          src="https://pbs.twimg.com/profile_images/1337055608613253126/r_eiMp2H_400x400.png"
          alt="Radix UI"
        />
      </a>
    </HoverCard.Trigger>
    <HoverCard.Portal>
      <HoverCard.Content className="HoverCardContent" sideOffset={5}>
        <div style={{ display: 'flex', flexDirection: 'column', gap: 7 }}>
          <img
            className="Image large"
            src="https://pbs.twimg.com/profile_images/1337055608613253126/r_eiMp2H_400x400.png"
            alt="Radix UI"
          />
          <div style={{ display: 'flex', flexDirection: 'column', gap: 15 }}>
            <div>
              <div className="Text bold">Radix</div>
              <div className="Text faded">@radix_ui</div>
            </div>
            <div className="Text">
              Components, icons, colors, and templates for building high-quality, accessible UI.
              Free and open-source.
            </div>
            <div style={{ display: 'flex', gap: 15 }}>
              <div style={{ display: 'flex', gap: 5 }}>
                <div className="Text bold">0</div> <div className="Text faded">Following</div>
              </div>
              <div style={{ display: 'flex', gap: 5 }}>
                <div className="Text bold">2,900</div> <div className="Text faded">Followers</div>
              </div>
            </div>
          </div>
        </div>

        <HoverCard.Arrow className="HoverCardArrow" />
      </HoverCard.Content>
    </HoverCard.Portal>
  </HoverCard.Root>
);

export default HoverCardDemo;

Features

Can be controlled or uncontrolled.

Customize side, alignment, offsets, collision handling.

Optionally render a pointing arrow.

Supports custom open and close delays.

Ignored by screen readers.

Installation

Install the component from your command line.

npm install @radix-ui/react-hover-card

Anatomy

Import all parts and piece them together.

import * as HoverCard from '@radix-ui/react-hover-card';

export default () => (
  <HoverCard.Root>
    <HoverCard.Trigger />
    <HoverCard.Portal>
      <HoverCard.Content>
        <HoverCard.Arrow />
      </HoverCard.Content>
    </HoverCard.Portal>
  </HoverCard.Root>
);

API Reference

Root

Contains all the parts of a hover card.

Prop	Type	Default
`defaultOpen`	`boolean`	No default value
`open`	`boolean`	No default value
`onOpenChange`	`function`	No default value
`openDelay`	`number`	`700`
`closeDelay`	`number`	`300`

Trigger

The link that opens the hover card when hovered.

Prop	Type	Default
`asChild`	`boolean`	`false`

Data attribute	Values
`[data-state]`	`"open" \| "closed"`

Portal

When used, portals the content part into the body.

Prop	Type	Default
`forceMount`	`boolean`	No default value
`container`	`HTMLElement`	`document.body`

Content

The component that pops out when the hover card is open.

Prop	Type	Default
`asChild`	`boolean`	`false`
`forceMount`	`boolean`	No default value
`side`	`enum`	`"bottom"`
`sideOffset`	`number`	`0`
`align`	`enum`	`"center"`
`alignOffset`	`number`	`0`
`avoidCollisions`	`boolean`	`true`
`collisionBoundary`	`Boundary`	`[]`
`collisionPadding`	`number \| Padding`	`0`
`arrowPadding`	`number`	`0`
`sticky`	`enum`	`"partial"`
`hideWhenDetached`	`boolean`	`false`

Data attribute	Values
`[data-state]`	`"open" \| "closed"`
`[data-side]`	`"left" \| "right" \| "bottom" \| "top"`
`[data-align]`	`"start" \| "end" \| "center"`

CSS Variable	Description
`--radix-hover-card-content-transform-origin`	The `transform-origin` computed from the content and arrow positions/offsets
`--radix-hover-card-content-available-width`	The remaining width between the trigger and the boundary edge
`--radix-hover-card-content-available-height`	The remaining height between the trigger and the boundary edge
`--radix-hover-card-trigger-width`	The width of the trigger
`--radix-hover-card-trigger-height`	The height of the trigger

Arrow

An optional arrow element to render alongside the hover card. This can be used to help visually link the trigger with the HoverCard.Content. Must be rendered inside HoverCard.Content.

Prop	Type	Default
`asChild`	`boolean`	`false`
`width`	`number`	`10`
`height`	`number`	`5`

Examples

Show instantly

Use the openDelay prop to control the time it takes for the hover card to open.

import * as HoverCard from '@radix-ui/react-hover-card';

export default () => (
  <HoverCard.Root openDelay={0}>
    <HoverCard.Trigger>…</HoverCard.Trigger>
    <HoverCard.Content>…</HoverCard.Content>
  </HoverCard.Root>
);

Constrain the content size

You may want to constrain the width of the content so that it matches the trigger width. You may also want to constrain its height to not exceed the viewport.

We expose several CSS custom properties such as --radix-hover-card-trigger-width and --radix-hover-card-content-available-height to support this. Use them to constrain the content dimensions.

// index.jsx
import * as HoverCard from '@radix-ui/react-hover-card';
import './styles.css';

export default () => (
  <HoverCard.Root>
    <HoverCard.Trigger>…</HoverCard.Trigger>
    <HoverCard.Portal>
      <HoverCard.Content className="HoverCardContent" sideOffset={5}>
        …
      </HoverCard.Content>
    </HoverCard.Portal>
  </HoverCard.Root>
);

/* styles.css */
.HoverCardContent {
  width: var(--radix-hover-card-trigger-width);
  max-height: var(--radix-hover-card-content-available-height);
}

We expose a CSS custom property --radix-hover-card-content-transform-origin. Use it to animate the content from its computed origin based on side, sideOffset, align, alignOffset and any collisions.

// index.jsx
import * as HoverCard from '@radix-ui/react-hover-card';
import './styles.css';

export default () => (
  <HoverCard.Root>
    <HoverCard.Trigger>…</HoverCard.Trigger>
    <HoverCard.Content className="HoverCardContent">…</HoverCard.Content>
  </HoverCard.Root>
);

/* styles.css */
.HoverCardContent {
  transform-origin: var(--radix-hover-card-content-transform-origin);
  animation: scaleIn 0.5s ease-out;
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

Collision-aware animations

We expose data-side and data-align attributes. Their values will change at runtime to reflect collisions. Use them to create collision and direction-aware animations.

// index.jsx
import * as HoverCard from '@radix-ui/react-hover-card';
import './styles.css';

export default () => (
  <HoverCard.Root>
    <HoverCard.Trigger>…</HoverCard.Trigger>
    <HoverCard.Content className="HoverCardContent">…</HoverCard.Content>
  </HoverCard.Root>
);

/* styles.css */
.HoverCardContent {
  animation-duration: 0.6s;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}
.HoverCardContent[data-side='top'] {
  animation-name: slideUp;
}
.HoverCardContent[data-side='bottom'] {
  animation-name: slideDown;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

Accessibility

The hover card is intended for sighted users only, the content will be inaccessible to keyboard users.

Keyboard Interactions

Key	Description
`Tab`	Opens/closes the hover card.
`Enter`	Opens the hover card link

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