Popover

Displays rich content in a portal, triggered by a button.

View code

Features

Can be controlled or uncontrolled.
Customize side, alignment, offsets, collision handling.
Optionally render a pointing arrow.
Focus is fully managed and customizable.
Supports modal and non-modal modes.
Dismissing and layering behavior is highly customizable.

Installation

Install the component from your command line.

$ npm add reka-ui

Anatomy

Import all parts and piece them together.

vue

<script setup>
import { PopoverAnchor, PopoverArrow, PopoverClose, PopoverContent, PopoverPortal, PopoverRoot, PopoverTrigger } from 'reka-ui'
</script>

<template>
  <PopoverRoot>
    <PopoverTrigger />
    <PopoverAnchor />
    <PopoverPortal>
      <PopoverContent>
        <PopoverClose />
        <PopoverArrow />
      </PopoverContent>
    </PopoverPortal>
  </PopoverRoot>
</template>

API Reference

Root

Contains all the parts of a popover.

Prop	Default	Type
`defaultOpen`	`false`	`boolean` The open state of the popover when it is initially rendered. Use when you do not need to control its open state.
`modal`	`false`	`boolean` The modality of the popover. When set to true, interaction with outside elements will be disabled and only popover content will be visible to screen readers.
`open`		`boolean` The controlled open state of the popover.

Emit	Payload
`update:open`	`[value: boolean]` Event handler called when the open state of the popover changes.

Slots (default)	Payload
`open`	`boolean` Current open state

Trigger

The button that toggles the popover. By default, the PopoverContent will position itself against the trigger.

Prop	Default	Type
`as`	`'button'`	`AsTag \| Component` The element or component this component should render as. Can be overwrite by `asChild`
`asChild`		`boolean` Change the default rendered element for the one passed as a child, merging their props and behavior. Read our Composition guide for more details.

Data Attribute	Value
`[data-state]`	`"open" \| "closed"`

Anchor

An optional element to position the PopoverContent against. If this part is not used, the content will position alongside the PopoverTrigger.

Prop	Default	Type
`as`	`'div'`	`AsTag \| Component` The element or component this component should render as. Can be overwrite by `asChild`
`asChild`		`boolean` Change the default rendered element for the one passed as a child, merging their props and behavior. Read our Composition guide for more details.
`reference`		`ReferenceElement` The reference (or anchor) element that is being referred to for positioning. If not provided will use the current component as anchor.

Portal

When used, portals the content part into the body.

Prop	Default	Type
`disabled`		`boolean` Disable teleport and render the component inline reference
`forceMount`		`boolean` Used to force mounting when more control is needed. Useful when controlling animation with Vue animation libraries.
`to`		`string \| HTMLElement` Vue native teleport component prop `:to` reference

Content

The component that pops out when the popover is open.

Prop	Default	Type
`align`		`'start' \| 'center' \| 'end'` The preferred alignment against the trigger. May change when collisions occur.
`alignOffset`		`number` An offset in pixels from the `start` or `end` alignment options.
`arrowPadding`		`number` The padding between the arrow and the edges of the content. If your content has border-radius, this will prevent it from overflowing the corners.
`as`	`'div'`	`AsTag \| Component` The element or component this component should render as. Can be overwrite by `asChild`
`asChild`		`boolean` Change the default rendered element for the one passed as a child, merging their props and behavior. Read our Composition guide for more details.
`avoidCollisions`		`boolean` When `true`, overrides the side and align preferences to prevent collisions with boundary edges.
`collisionBoundary`		`Element \| (Element \| null)[] \| null` The element used as the collision boundary. By default this is the viewport, though you can provide additional element(s) to be included in this check.
`collisionPadding`		`number \| Partial<Record<'top' \| 'right' \| 'bottom' \| 'left', number>>` The distance in pixels from the boundary edges where collision detection should occur. Accepts a number (same for all sides), or a partial padding object, for example: { top: 20, left: 20 }.
`disableOutsidePointerEvents`		`boolean` When `true`, hover/focus/click interactions will be disabled on elements outside the `DismissableLayer`. Users will need to click twice on outside elements to interact with them: once to close the `DismissableLayer`, and again to trigger the element.
`disableUpdateOnLayoutShift`		`boolean` Whether to disable the update position for the content when the layout shifted.
`forceMount`		`boolean` Used to force mounting when more control is needed. Useful when controlling animation with Vue animation libraries.
`hideWhenDetached`		`boolean` Whether to hide the content when the trigger becomes fully occluded.
`positionStrategy`		`'fixed' \| 'absolute'` The type of CSS position property to use.
`prioritizePosition`		`boolean` Force content to be position within the viewport. Might overlap the reference element, which may not be desired.
`reference`		`ReferenceElement` The custom element or virtual element that will be set as the reference to position the floating element. If provided, it will replace the default anchor element.
`side`		`'top' \| 'right' \| 'bottom' \| 'left'` The preferred side of the trigger to render against when open. Will be reversed when collisions occur and avoidCollisions is enabled.
`sideOffset`		`number` The distance in pixels from the trigger.
`sticky`		`'partial' \| 'always'` The sticky behavior on the align axis. `partial` will keep the content in the boundary as long as the trigger is at least partially in the boundary whilst "always" will keep the content in the boundary regardless.
`trapFocus`		`boolean` Whether focus should be trapped within the `MenuContent`
`updatePositionStrategy`		`'always' \| 'optimized'` Strategy to update the position of the floating element on every animation frame.

Emit	Payload
`closeAutoFocus`	`[event: Event]` Event handler called when auto-focusing on close. Can be prevented.
`escapeKeyDown`	`[event: KeyboardEvent]` Event handler called when the escape key is down. Can be prevented.
`focusOutside`	`[event: FocusOutsideEvent]` Event handler called when the focus moves outside of the `DismissableLayer`. Can be prevented.
`interactOutside`	`[event: PointerDownOutsideEvent \| FocusOutsideEvent]` Event handler called when an interaction happens outside the `DismissableLayer`. Specifically, when a `pointerdown` event happens outside or focus moves outside of it. Can be prevented.
`openAutoFocus`	`[event: Event]` Event handler called when auto-focusing on open. Can be prevented.
`pointerDownOutside`	`[event: PointerDownOutsideEvent]` Event handler called when the a `pointerdown` event happens outside of the `DismissableLayer`. Can be prevented.

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

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

Arrow

An optional arrow element to render alongside the popover. This can be used to help visually link the anchor with the PopoverContent. Must be rendered inside PopoverContent.

Prop	Default	Type
`as`	`'svg'`	`AsTag \| Component` The element or component this component should render as. Can be overwrite by `asChild`
`asChild`		`boolean` Change the default rendered element for the one passed as a child, merging their props and behavior. Read our Composition guide for more details.
`height`	`5`	`number` The height of the arrow in pixels.
`rounded`		`boolean` When `true`, render the rounded version of arrow. Do not work with `as`/`asChild`
`width`	`10`	`number` The width of the arrow in pixels.

Close

The button that closes an open popover.

Prop	Default	Type
`as`	`'button'`	`AsTag \| Component` The element or component this component should render as. Can be overwrite by `asChild`
`asChild`		`boolean` Change the default rendered element for the one passed as a child, merging their props and behavior. Read our Composition guide for more details.

Examples

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 --reka-popover-trigger-width and --reka-popover-content-available-height to support this. Use them to constrain the content dimensions.

vue

// index.vue
<script setup>
import { PopoverArrow, PopoverClose, PopoverContent, PopoverPortal, PopoverRoot, PopoverTrigger } from 'reka-ui'
</script>

<template>
  <PopoverRoot>
    <PopoverTrigger>…</PopoverTrigger>
    <PopoverPortal>
      <PopoverContent
        class="PopoverContent"
        :side-offset="5"
      >
        …
      </PopoverContent>
    </PopoverPortal>
  </PopoverRoot>
</template>

css

/* styles.css */
.PopoverContent {
  width: var(--reka-popover-trigger-width);
  max-height: var(--reka-popover-content-available-height);
}

Origin-aware animations

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

vue

// index.vue
<script setup>
import { PopoverArrow, PopoverClose, PopoverContent, PopoverPortal, PopoverRoot, PopoverTrigger } from 'reka-ui'
</script>

<template>
  <PopoverRoot>
    <PopoverTrigger>…</PopoverTrigger>
    <PopoverPortal>
      <PopoverContent class="PopoverContent">
        …
      </PopoverContent>
    </PopoverPortal>
  </PopoverRoot>
</template>

css

/* styles.css */
.PopoverContent {
  transform-origin: var(--reka-popover-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.

vue

// index.vue
<script setup>
import { PopoverArrow, PopoverClose, PopoverContent, PopoverPortal, PopoverRoot, PopoverTrigger } from 'reka-ui'
</script>

<template>
  <PopoverRoot>
    <PopoverTrigger>…</PopoverTrigger>
    <PopoverPortal>
      <PopoverContent class="PopoverContent">
        …
      </PopoverContent>
    </PopoverPortal>
  </PopoverRoot>
</template>

css

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

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

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

With custom anchor

You can anchor the content to another element if you do not want to use the trigger as the anchor.

vue

// index.vue
<script setup>
import { PopoverAnchor, PopoverArrow, PopoverClose, PopoverContent, PopoverPortal, PopoverRoot, PopoverTrigger } from 'reka-ui'
</script>

<template>
  <PopoverRoot>
    <PopoverAnchor as-child>
      <div class="Row">
        Row as anchor <PopoverTrigger>Trigger</PopoverTrigger>
      </div>
    </PopoverAnchor>

    <PopoverPortal>
      <PopoverContent>…</PopoverContent>
    </PopoverPortal>
  </PopoverRoot>
</template>

css

/* styles.css */
.Row {
  background-color: gainsboro;
  padding: 20px;
}

Accessibility

Adheres to the Dialog WAI-ARIA design pattern.

Keyboard Interactions

Key	Description
`Space`	Opens/closes the popover.
`Enter`	Opens/closes the popover.
`Tab`	Moves focus to the next focusable element
`Shift + Tab`	Moves focus to the previous focusable element
`Esc`	Closes the popover and moves focus to `PopoverTrigger`.

Custom APIs

Create your own API by abstracting the primitive parts into your own component.

Abstract the arrow and set default configuration

This example abstracts the PopoverArrow part and sets a default sideOffset configuration.

Usage

vue

<script setup lang="ts">
import { Popover, PopoverContent, PopoverTrigger } from './your-popover'
</script>

<template>
  <Popover>
    <PopoverTrigger>Popover trigger</PopoverTrigger>
    <PopoverContent>Popover content</PopoverContent>
  </Popover>
</template>

Implementation

// your-popover.ts
export { default as PopoverContent } from 'PopoverContent.vue'

export { PopoverRoot as Popover, PopoverTrigger } from 'reka-ui'

vue

<!-- PopoverContent.vue -->
<script setup lang="ts">
import { PopoverContent, type PopoverContentEmits, type PopoverContentProps, PopoverPortal, useForwardPropsEmits, } from 'reka-ui'

const props = defineProps<PopoverContentProps>()
const emits = defineEmits<PopoverContentEmits>()

const forwarded = useForwardPropsEmits(props, emits)
</script>

<template>
  <PopoverPortal>
    <PopoverContent v-bind="{ ...forwarded, ...$attrs }">
      <slot />
    </PopoverContent>
  </PopoverPortal>
</template>

Popover ​

Features ​

Installation ​

Anatomy ​

API Reference ​

Root ​

Trigger ​

Anchor ​

Portal ​

Content ​

Arrow ​

Close ​

Examples ​

Constrain the content size ​

Origin-aware animations ​

Collision-aware animations ​

With custom anchor ​

Accessibility ​

Keyboard Interactions ​

Custom APIs ​

Abstract the arrow and set default configuration ​

Usage ​

Implementation ​