Select

A common form component for choosing a predefined value in a dropdown menu.

Apple

import * as React from 'react';
import { Select } from '@base-ui/react/select';
import styles from './index.module.css';

const apples = [
  { label: 'Gala', value: 'gala' },
  { label: 'Fuji', value: 'fuji' },
  { label: 'Honeycrisp', value: 'honeycrisp' },
  { label: 'Granny Smith', value: 'granny-smith' },
  { label: 'Pink Lady', value: 'pink-lady' },
];

export default function ExampleSelect() {
  return (
    <div className={styles.Field}>
      <Select.Root items={apples}>
        <Select.Label className={styles.Label}>Apple</Select.Label>
        <Select.Trigger className={styles.Select}>
          <Select.Value className={styles.Value} placeholder="Select apple" />
          <Select.Icon className={styles.SelectIcon}>
            <ChevronUpDownIcon />
          </Select.Icon>
        </Select.Trigger>
        <Select.Portal>
          <Select.Positioner className={styles.Positioner} sideOffset={8}>
            <Select.Popup className={styles.Popup}>
              <Select.ScrollUpArrow className={styles.ScrollArrow} />
              <Select.List className={styles.List}>
                {apples.map(({ label, value }) => (
                  <Select.Item key={label} value={value} className={styles.Item}>
                    <Select.ItemIndicator className={styles.ItemIndicator}>
                      <CheckIcon className={styles.ItemIndicatorIcon} />
                    </Select.ItemIndicator>
                    <Select.ItemText className={styles.ItemText}>{label}</Select.ItemText>
                  </Select.Item>
                ))}
              </Select.List>
              <Select.ScrollDownArrow className={styles.ScrollArrow} />
            </Select.Popup>
          </Select.Positioner>
        </Select.Portal>
      </Select.Root>
    </div>
  );
}

function ChevronUpDownIcon(props: React.ComponentProps<'svg'>) {
  return (
    <svg
      width="8"
      height="12"
      viewBox="0 0 8 12"
      fill="none"
      stroke="currentcolor"
      strokeWidth="1.5"
      {...props}
    >
      <path d="M0.5 4.5L4 1.5L7.5 4.5" />
      <path d="M0.5 7.5L4 10.5L7.5 7.5" />
    </svg>
  );
}

function CheckIcon(props: React.ComponentProps<'svg'>) {
  return (
    <svg fill="currentcolor" width="10" height="10" viewBox="0 0 10 10" {...props}>
      <path d="M9.1603 1.12218C9.50684 1.34873 9.60427 1.81354 9.37792 2.16038L5.13603 8.66012C5.01614 8.8438 4.82192 8.96576 4.60451 8.99384C4.3871 9.02194 4.1683 8.95335 4.00574 8.80615L1.24664 6.30769C0.939709 6.02975 0.916013 5.55541 1.19372 5.24822C1.47142 4.94102 1.94536 4.91731 2.2523 5.19524L4.36085 7.10461L8.12299 1.33999C8.34934 0.993152 8.81376 0.895638 9.1603 1.12218Z" />
    </svg>
  );
}

Usage guidelines

Prefer Combobox for large lists: Select is not filterable, aside from basic keyboard typeahead functionality to find items by focusing and highlighting them. Prefer Combobox instead of Select when the number of items is sufficiently large to warrant filtering.
Special positioning behavior: The select popup by default overlaps its trigger so the selected item’s text is aligned with the trigger’s value text. This behavior can be disabled or customized.
Form controls must have an accessible name: Prefer <Select.Label>, or provide an aria-label on <Select.Trigger> when no visible label is rendered. See Labeling a select and the forms guide.

Anatomy

Import the component and assemble its parts:

Anatomy

import { Select } from '@base-ui/react/select';

<Select.Root>
  <Select.Label />
  <Select.Trigger>
    <Select.Value />
    <Select.Icon />
  </Select.Trigger>

  <Select.Portal>
    <Select.Backdrop />
    <Select.Positioner>
      <Select.ScrollUpArrow />
      <Select.Popup>
        <Select.Arrow />
        <Select.List>
          <Select.Item>
            <Select.ItemText />
            <Select.ItemIndicator />
          </Select.Item>
          <Select.Separator />
          <Select.Group>
            <Select.GroupLabel />
          </Select.Group>
        </Select.List>
      </Select.Popup>
      <Select.ScrollDownArrow />
    </Select.Positioner>
  </Select.Portal>
</Select.Root>

<Select.Positioner> has a special prop called alignItemWithTrigger which causes the positioning to act differently by default from other Positioner components. The prop makes the select popup overlap the trigger so the selected item’s text is aligned with the trigger’s value text.

For styling, data-side is "none" on the .Popup and .Positioner parts when the mode is active.

To prevent the select popup from overlapping its trigger, set the alignItemWithTrigger prop to false. When set to true (its default) there are a few important points to note about its behavior:

Interaction type dependent: For UX reasons, the alignItemWithTrigger positioning mode is disabled if touch was the pointer type used to open the popup.
Viewport space dependent: There must be enough space in the viewport to align the selected item’s text with the trigger’s value text without causing the popup to be too vertically small — otherwise, it falls back to the default positioning mode. This can be customized by setting min-height on the <Select.Positioner> element; a smaller value will fallback less often. Additionally, the trigger must be at least 20px from the edges of the top and bottom of the viewport, or it will also fall back.
Other positioning props are ignored: Props like side or align have no effect unless the prop is set to false or when in fallback mode.

Examples

Typed wrapper component

The following example shows a typed wrapper around the Select component with correct type inference and type safety:

Specifying generic type parameters

import * as React from 'react';
import { Select } from '@base-ui/react/select';

export function MySelect<Value, Multiple extends boolean | undefined = false>(
  props: Select.Root.Props<Value, Multiple>,
): React.JSX.Element {
  return <Select.Root {...props}>{/* ... */}</Select.Root>;
}

Formatting the value

By default, the <Select.Value> component renders the raw value.

Passing the items prop to <Select.Root> instead renders the matching label for the rendered value:

items prop

const items = [
  { value: null, label: 'Select theme' },
  { value: 'system', label: 'System default' },
  { value: 'light', label: 'Light' },
  { value: 'dark', label: 'Dark' },
];

<Select.Root items={items}>
  <Select.Value />
</Select.Root>

A function can also be passed as the children prop of <Select.Value> to render a formatted value:

Lookup map

const items = {
  monospace: 'Monospace',
  serif: 'Serif',
  'san-serif': 'Sans-serif',
};

<Select.Value>
  {(value: keyof typeof items) => (
    <span style={{ fontFamily: value }}>
      {items[value]}
    </span>
  )}
</Select.Value>

To avoid lookup, object values for each item can also be used.

Labeling a select

Use <Select.Label> to provide a visible label for the select trigger:

Using Select.Label to label a select

<Select.Root>
  <Select.Label>Theme</Select.Label>
  {/* ... */}
</Select.Root>

<Select.Label> renders a <div>, so clicking it focuses the select trigger without opening the popup.

Placeholder values

To show a placeholder value, use the placeholder prop on <Select.Value>:

Placeholder item

const items = [
  { value: 'system', label: 'System default' },
  { value: 'light', label: 'Light' },
  { value: 'dark', label: 'Dark' },
];

<Select.Root items={items}>
  <Select.Value placeholder="Select theme" />
</Select.Root>

With placeholders, users cannot clear selected values using the select itself. If the select value should be clearable from the popup (instead of an external “reset” button), use a null item rendered in the list itself:

Clearable item

const items = [
  { value: null, label: 'Select theme' },
  { value: 'system', label: 'System default' },
  { value: 'light', label: 'Light' },
  { value: 'dark', label: 'Dark' },
];

<Select.Root items={items}>
  <Select.Value />
</Select.Root>

Multiple selection

Add the multiple prop to the <Select.Root> component to allow multiple selections.

Languages

Object values

Select items can use objects as values instead of primitives. This lets you access the full object in custom render functions, and can avoid needing to specify items for lookup.

Shipping method

Grouped

Organize related options with <Select.Group> and <Select.GroupLabel> to add section headings inside the popup.

Groups are represented by an array of objects with an items property, which itself is an array of individual items for each group. An extra property, such as value, can be provided for the heading text when rendering the group label.

Example

interface ProduceGroupItem {
  value: string;
  items: string[];
}

const groups: ProduceGroupItem[] = [
  {
    value: 'Fruits',
    items: ['Apple', 'Banana', 'Orange'],
  },
  {
    value: 'Vegetables',
    items: ['Carrot', 'Lettuce', 'Spinach'],
  },
];

Produce

API reference

Root

Groups all parts of the select. Doesn’t render its own HTML element.

namestring—

Name: name
Description: Identifies the field when a form is submitted.
Type: string | undefined

defaultValueUnion—

Name: defaultValue
Description: The uncontrolled value of the select when it’s initially rendered.

To render a controlled select, use the value prop instead.
Type: Value[] | Value | null | undefined

valueUnion—

Name: value
Description: The value of the select. Use when controlled.
Type: Value[] | Value | null | undefined

onValueChangefunction—

Name: onValueChange
Description: Event handler called when the value of the select changes.
Type: | (( value: Value[] | Value | null, eventDetails: Select.Root.ChangeEventDetails, ) => void) | undefined

defaultOpenbooleanfalse

Name: defaultOpen
Description: Whether the select popup is initially open.

To render a controlled select popup, use the open prop instead.
Type: boolean | undefined
Default: false

openboolean—

Name: open
Description: Whether the select popup is currently open.
Type: boolean | undefined

onOpenChangefunction—

Name: onOpenChange
Description: Event handler called when the select popup is opened or closed.
Type: | (( open: boolean, eventDetails: Select.Root.ChangeEventDetails, ) => void) | undefined

highlightItemOnHoverbooleantrue

Name: highlightItemOnHover
Description: Whether moving the pointer over items should highlight them. Disabling this prop allows CSS :hover to be differentiated from the :focus (data-highlighted) state.
Type: boolean | undefined
Default: true

actionsRefReact.RefObject<Select.Root.Actions | null>—

Name: actionsRef
Description: A ref to imperative actions.

unmount: When specified, the select will not be unmounted when closed. Instead, the unmount function must be called to unmount the select manually. Useful when the select’s animation is controlled by an external library.
Type: | React.RefObject<Select.Root.Actions | null> | undefined

autoCompletestring—

Name: autoComplete
Description: Provides a hint to the browser for autofill.
Type: string | undefined

formstring—

Name: form
Description: Identifies the form that owns the hidden input. Useful when the select is rendered outside the form.
Type: string | undefined

isItemEqualToValuefunction—

Name: isItemEqualToValue
Description: Custom comparison logic used to determine if a select item value matches the current selected value. Useful when item values are objects without matching referentially. Defaults to Object.is comparison.
Type: | ((itemValue: Value, value: Value) => boolean) | undefined

itemToStringLabelfunction—

Name: itemToStringLabel
Description: When the item values are objects (<Select.Item value={object}>), this function converts the object value to a string representation for display in the trigger. If the shape of the object is { value, label }, the label will be used automatically without needing to specify this prop.
Type: ((itemValue: Value) => string) | undefined

itemToStringValuefunction—

Name: itemToStringValue
Description: When the item values are objects (<Select.Item value={object}>), this function converts the object value to a string representation for form submission. If the shape of the object is { value, label }, the value will be used automatically without needing to specify this prop.
Type: ((itemValue: Value) => string) | undefined

itemsUnion—

Name: items
Description: Data structure of the items rendered in the select popup. When specified, <Select.Value> renders the label of the selected item instead of the raw value.
Type: | Record<string, React.ReactNode> | { label: React.ReactNode; value: any }[] | Group[] | undefined
Example: const items = { sans: 'Sans-serif', serif: 'Serif', mono: 'Monospace', cursive: 'Cursive', }; <Select.Root items={items} />

Name: modal
Description: Determines if the select enters a modal state when open.

true: user interaction is limited to the select: document page scroll is locked and pointer interactions on outside elements are disabled.

false: user interaction with the rest of the document is allowed.
Type: boolean | undefined
Default: true

multiplebooleanfalse

Name: multiple
Description: Whether multiple items can be selected.
Type: boolean | undefined
Default: false

onOpenChangeCompletefunction—

Name: onOpenChangeComplete
Description: Event handler called after any animations complete when the select popup is opened or closed.
Type: ((open: boolean) => void) | undefined

disabledbooleanfalse

Name: disabled
Description: Whether the component should ignore user interaction.
Type: boolean | undefined
Default: false

readOnlybooleanfalse

Name: readOnly
Description: Whether the user should be unable to choose a different option from the select popup.
Type: boolean | undefined
Default: false

requiredbooleanfalse

Name: required
Description: Whether the user must choose a value before submitting a form.
Type: boolean | undefined
Default: false

inputRefReact.Ref<HTMLInputElement>—

Name: inputRef
Description: A ref to access the hidden input element.
Type: React.Ref<HTMLInputElement> | undefined

idstring—

Name: id
Description: The id of the Select.
Type: string | undefined

childrenReact.ReactNode—

Name: children
Type: React.ReactNode | undefined

Select.Root.PropsHide

Re-Export of Root props as SelectRootProps

Select.Root.StateHide

type SelectRootState = {}

Select.Root.ActionsHide

type SelectRootActions = { unmount: () => void }

Select.Root.ChangeEventReasonHide

type SelectRootChangeEventReason =
  | 'trigger-press'
  | 'outside-press'
  | 'escape-key'
  | 'window-resize'
  | 'item-press'
  | 'focus-out'
  | 'list-navigation'
  | 'cancel-open'
  | 'none'

Select.Root.ChangeEventDetailsHide

type SelectRootChangeEventDetails = (
  | { reason: 'trigger-press'; event: MouseEvent | PointerEvent | TouchEvent | KeyboardEvent }
  | { reason: 'outside-press'; event: MouseEvent | PointerEvent | TouchEvent }
  | { reason: 'escape-key'; event: KeyboardEvent }
  | { reason: 'window-resize'; event: UIEvent }
  | { reason: 'item-press'; event: MouseEvent | PointerEvent | KeyboardEvent }
  | { reason: 'focus-out'; event: KeyboardEvent | FocusEvent }
  | { reason: 'list-navigation'; event: KeyboardEvent }
  | { reason: 'cancel-open'; event: MouseEvent }
  | { reason: 'none'; event: Event }
) & {
  /** Cancels Base UI from handling the event. */
  cancel: () => void;
  /** Allows the event to propagate in cases where Base UI will stop the propagation. */
  allowPropagation: () => void;
  /** Indicates whether the event has been canceled. */
  isCanceled: boolean;
  /** Indicates whether the event is allowed to propagate. */
  isPropagationAllowed: boolean;
  /** The element that triggered the event, if applicable. */
  trigger: Element | undefined;
}

Label

An accessible label that is automatically associated with the select trigger. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Trigger.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Trigger.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Trigger.State, ) => ReactElement) | undefined

Select.Label.PropsHide

Re-Export of Label props as SelectLabelProps

Select.Label.StateHide

type SelectLabelState = {
  /** Whether the component should ignore user interaction. */
  disabled: boolean;
  /** Whether the field has been touched. */
  touched: boolean;
  /** Whether the field value has changed from its initial value. */
  dirty: boolean;
  /** Whether the field is valid. */
  valid: boolean | null;
  /** Whether the field has a value. */
  filled: boolean;
  /** Whether the field is focused. */
  focused: boolean;
}

Trigger

A button that opens the select popup. Renders a <button> element.

nativeButtonbooleantrue

Name: nativeButton
Description: Whether the component renders a native <button> element when replacing it via the render prop. Set to false if the rendered element is not a button (for example, <div>).
Type: boolean | undefined
Default: true

disabledboolean—

Name: disabled
Description: Whether the component should ignore user interaction.
Type: boolean | undefined

childrenReact.ReactNode—

Name: children
Type: React.ReactNode | undefined

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Trigger.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Trigger.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Trigger.State, ) => ReactElement) | undefined

data-popup-open

Present when the corresponding select is open.

data-pressed

Present when the trigger is pressed.

data-disabled

Present when the select is disabled.

data-readonly

Present when the select is readonly.

data-required

Present when the select is required.

data-valid

Present when the select is in valid state (when wrapped in Field.Root).

data-invalid

Present when the select is in invalid state (when wrapped in Field.Root).

data-dirty

Present when the select’s value has changed (when wrapped in Field.Root).

data-touched

Present when the select has been touched (when wrapped in Field.Root).

data-filled

Present when the select has a value (when wrapped in Field.Root).

data-focused

Present when the select trigger is focused (when wrapped in Field.Root).

data-placeholder

Present when the select doesn’t have a value.

Attribute	Description	-
`data-popup-open`	Present when the corresponding select is open.
`data-pressed`	Present when the trigger is pressed.
`data-disabled`	Present when the select is disabled.
`data-readonly`	Present when the select is readonly.
`data-required`	Present when the select is required.
`data-valid`	Present when the select is in valid state (when wrapped in Field.Root).
`data-invalid`	Present when the select is in invalid state (when wrapped in Field.Root).
`data-dirty`	Present when the select’s value has changed (when wrapped in Field.Root).
`data-touched`	Present when the select has been touched (when wrapped in Field.Root).
`data-filled`	Present when the select has a value (when wrapped in Field.Root).
`data-focused`	Present when the select trigger is focused (when wrapped in Field.Root).
`data-placeholder`	Present when the select doesn’t have a value.

Select.Trigger.PropsHide

Re-Export of Trigger props as SelectTriggerProps

Select.Trigger.StateHide

type SelectTriggerState = {
  /** Whether the select popup is currently open. */
  open: boolean;
  /** Whether the select popup is readonly. */
  readOnly: boolean;
  /** The value of the currently selected item. */
  value: any;
  /** Whether the select doesn't have a value. */
  placeholder: boolean;
  /** Whether the component should ignore user interaction. */
  disabled: boolean;
  /** Whether the field has been touched. */
  touched: boolean;
  /** Whether the field value has changed from its initial value. */
  dirty: boolean;
  /** Whether the field is valid. */
  valid: boolean | null;
  /** Whether the field has a value. */
  filled: boolean;
  /** Whether the field is focused. */
  focused: boolean;
}

Value

A text label of the currently selected item. Renders a <span> element.

placeholderReact.ReactNode—

Name: placeholder
Description: The placeholder value to display when no value is selected. This is overridden by children if specified, or by a null item’s label in items.
Type: React.ReactNode | undefined

children

| React.ReactNode 
|  ((value: any) => React.ReactNode)

—

Name: children
Description: Accepts a function that returns a ReactNode to format the selected value.
Type: | React.ReactNode | ((value: any) => React.ReactNode) | undefined
Example: <Select.Value> {(value: string | null) => value ? labels[value] : 'No value'} </Select.Value>

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Value.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Value.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Value.State, ) => ReactElement) | undefined

data-placeholder

Present when the select doesn’t have a value.

Attribute	Description	-
`data-placeholder`	Present when the select doesn’t have a value.

Select.Value.PropsHide

Re-Export of Value props as SelectValueProps

Select.Value.StateHide

type SelectValueState = {
  /** The value of the currently selected item. */
  value: any;
  /** Whether the placeholder is being displayed. */
  placeholder: boolean;
}

Icon

An icon that indicates that the trigger button opens a select popup. Renders a <span> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Icon.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Icon.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Icon.State, ) => ReactElement) | undefined

data-popup-open

Present when the corresponding popup is open.

Attribute	Description	-
`data-popup-open`	Present when the corresponding popup is open.

Select.Icon.PropsHide

Re-Export of Icon props as SelectIconProps

Select.Icon.StateHide

type SelectIconState = {
  /** Whether the select popup is currently open. */
  open: boolean;
}

Backdrop

An overlay displayed beneath the menu popup. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Backdrop.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Backdrop.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Backdrop.State, ) => ReactElement) | undefined

data-open

Present when the select is open.

data-closed

Present when the select is closed.

data-starting-style

Present when the select is animating in.

data-ending-style

Present when the select is animating out.

Attribute	Description	-
`data-open`	Present when the select is open.
`data-closed`	Present when the select is closed.
`data-starting-style`	Present when the select is animating in.
`data-ending-style`	Present when the select is animating out.

Select.Backdrop.PropsHide

Re-Export of Backdrop props as SelectBackdropProps

Select.Backdrop.StateHide

type SelectBackdropState = {
  /** Whether the component is open. */
  open: boolean;
  /** The transition status of the component. */
  transitionStatus: TransitionStatus;
}

Portal

A portal element that moves the popup to a different part of the DOM. By default, the portal element is appended to <body>. Renders a <div> element.

containerUnion—

Name: container
Description: A parent element to render the portal element into.
Type: | HTMLElement | ShadowRoot | React.RefObject<HTMLElement | ShadowRoot | null> | null | undefined

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Portal.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Portal.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Portal.State, ) => ReactElement) | undefined

Select.Portal.PropsHide

Re-Export of Portal props as SelectPortalProps

Select.Portal.StateHide

type SelectPortalState = {}

Positioner

Positions the select popup. Renders a <div> element.

alignItemWithTriggerbooleantrue

Name: alignItemWithTrigger
Description: Whether the positioner overlaps the trigger so the selected item’s text is aligned with the trigger’s value text. This only applies to mouse input and is automatically disabled if there is not enough space.
Type: boolean | undefined
Default: true

disableAnchorTrackingbooleanfalse

Name: disableAnchorTracking
Description: Whether to disable the popup from tracking any layout shift of its positioning anchor.
Type: boolean | undefined
Default: false

alignAlign'center'

Name: align
Description: How to align the popup relative to the specified side.
Type: 'start' | 'center' | 'end' | undefined
Default: 'center'

alignOffsetnumber | OffsetFunction0

Name: alignOffset
Description: Additional offset along the alignment axis in pixels. Also accepts a function that returns the offset to read the dimensions of the anchor and positioner elements, along with its side and alignment.

The function takes a data object parameter with the following properties:

data.anchor: the dimensions of the anchor element with properties width and height.

data.positioner: the dimensions of the positioner element with properties width and height.

data.side: which side of the anchor element the positioner is aligned against.

data.align: how the positioner is aligned relative to the specified side.
Type: | number | ((data: { side: | 'top' | 'bottom' | 'left' | 'right' | 'inline-end' | 'inline-start'; align: 'start' | 'center' | 'end'; anchor: { width: number; height: number }; positioner: { width: number; height: number }; }) => number) | undefined
Default: 0
Example: <Positioner alignOffset={({ side, align, anchor, positioner }) => { return side === 'top' || side === 'bottom' ? anchor.width : anchor.height; }} />

sideSide'bottom'

Name: side
Description: Which side of the anchor element to align the popup against. May automatically change to avoid collisions.
Type: | 'top' | 'bottom' | 'left' | 'right' | 'inline-end' | 'inline-start' | undefined
Default: 'bottom'

sideOffsetnumber | OffsetFunction0

Name: sideOffset
Description: Distance between the anchor and the popup in pixels. Also accepts a function that returns the distance to read the dimensions of the anchor and positioner elements, along with its side and alignment.

The function takes a data object parameter with the following properties:

data.anchor: the dimensions of the anchor element with properties width and height.

data.positioner: the dimensions of the positioner element with properties width and height.

data.side: which side of the anchor element the positioner is aligned against.

data.align: how the positioner is aligned relative to the specified side.
Type: | number | ((data: { side: | 'top' | 'bottom' | 'left' | 'right' | 'inline-end' | 'inline-start'; align: 'start' | 'center' | 'end'; anchor: { width: number; height: number }; positioner: { width: number; height: number }; }) => number) | undefined
Default: 0
Example: <Positioner sideOffset={({ side, align, anchor, positioner }) => { return side === 'top' || side === 'bottom' ? anchor.height : anchor.width; }} />

arrowPaddingnumber5

Name: arrowPadding
Description: Minimum distance to maintain between the arrow and the edges of the popup.

Use it to prevent the arrow element from hanging out of the rounded corners of a popup.
Type: number | undefined
Default: 5

anchorUnion—

Name: anchor
Description: An element to position the popup against. By default, the popup will be positioned against the trigger.
Type: | Element | VirtualElement | React.RefObject<Element | null> | (() => Element | VirtualElement | null) | null | undefined

collisionAvoidanceCollisionAvoidance—

Name: collisionAvoidance
Description: Determines how to handle collisions when positioning the popup.

side controls overflow on the preferred placement axis (top/bottom or left/right):

'flip': keep the requested side when it fits; otherwise try the opposite side (top and bottom, or left and right).

'shift': never change side; keep the requested side and move the popup within the clipping boundary so it stays visible.

'none': do not correct side-axis overflow.

align controls overflow on the alignment axis (start/center/end):

'flip': keep side, but swap start and end when the requested alignment overflows.

'shift': keep side and requested alignment, then nudge the popup along the alignment axis to fit.

'none': do not correct alignment-axis overflow.

fallbackAxisSide controls fallback behavior on the perpendicular axis when the preferred axis cannot fit:

'start': allow perpendicular fallback and try the logical start side first (top before bottom, or left before right in LTR).

'end': allow perpendicular fallback and try the logical end side first (bottom before top, or right before left in LTR).

'none': do not fallback to the perpendicular axis.

When side is 'shift', explicitly setting align only supports 'shift' or 'none'. If align is omitted, it defaults to 'flip'.
Type: CollisionAvoidance | undefined
Example: <Positioner collisionAvoidance={{ side: 'shift', align: 'shift', fallbackAxisSide: 'none', }} />

collisionBoundaryBoundary'clipping-ancestors'

Name: collisionBoundary
Description: An element or a rectangle that delimits the area that the popup is confined to.
Type: Boundary | undefined
Default: 'clipping-ancestors'

collisionPaddingPadding5

Name: collisionPadding
Description: Additional space to maintain from the edge of the collision boundary.
Type: Padding | undefined
Default: 5

stickybooleanfalse

Name: sticky
Description: Whether to maintain the popup in the viewport after the anchor element was scrolled out of view.
Type: boolean | undefined
Default: false

positionMethod'absolute' | 'fixed''absolute'

Name: positionMethod
Description: Determines which CSS position property to use.
Type: 'absolute' | 'fixed' | undefined
Default: 'absolute'

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Positioner.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Positioner.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Positioner.State, ) => ReactElement) | undefined

data-open

Present when the select popup is open.

data-closed

Present when the select popup is closed.

data-anchor-hidden

Present when the anchor is hidden.

data-align

Indicates how the popup is aligned relative to specified side.

data-side

Indicates which side the popup is positioned relative to the trigger.

Attribute	Description	-
`data-open`	Present when the select popup is open.
`data-closed`	Present when the select popup is closed.
`data-anchor-hidden`	Present when the anchor is hidden.
`data-align`	Indicates how the popup is aligned relative to specified side.
`data-side`	Indicates which side the popup is positioned relative to the trigger.

--anchor-height

The anchor’s height.

--anchor-width

The anchor’s width.

--available-height

The available height between the trigger and the edge of the viewport.

--available-width

The available width between the trigger and the edge of the viewport.

--transform-origin

The coordinates that this element is anchored to. Used for animations and transitions.

CSS Variable	Description	-
`--anchor-height`	The anchor’s height.
`--anchor-width`	The anchor’s width.
`--available-height`	The available height between the trigger and the edge of the viewport.
`--available-width`	The available width between the trigger and the edge of the viewport.
`--transform-origin`	The coordinates that this element is anchored to. Used for animations and transitions.

Select.Positioner.PropsHide

Re-Export of Positioner props as SelectPositionerProps

Select.Positioner.StateHide

type SelectPositionerState = {
  /** Whether the component is open. */
  open: boolean;
  /** The side of the anchor the component is placed on. */
  side: 'top' | 'bottom' | 'left' | 'right' | 'inline-end' | 'inline-start' | 'none';
  /** The alignment of the component relative to the anchor. */
  align: 'start' | 'center' | 'end';
  /** Whether the anchor element is hidden. */
  anchorHidden: boolean;
}

A container for the select list. Renders a <div> element.

finalFocusUnion—

Name: finalFocus
Description: Determines the element to focus when the select popup is closed.

false: Do not move focus.

true: Move focus based on the default behavior (trigger or previously focused element).

RefObject: Move focus to the ref element.

function: Called with the interaction type (mouse, touch, pen, or keyboard). Return an element to focus, true to use the default behavior, or false/undefined to do nothing.
Type: | boolean | React.RefObject<HTMLElement | null> | (( closeType: | 'mouse' | 'touch' | 'pen' | 'keyboard' | '', ) => boolean | void | HTMLElement | null) | undefined

childrenReact.ReactNode—

Name: children
Type: React.ReactNode | undefined

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Popup.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Popup.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Popup.State, ) => ReactElement) | undefined

data-open

Present when the select is open.

data-closed

Present when the select is closed.

data-align

Indicates how the popup is aligned relative to specified side.

data-side

Indicates which side the popup is positioned relative to the trigger.

data-starting-style

Present when the select is animating in.

data-ending-style

Present when the select is animating out.

Attribute	Description	-
`data-open`	Present when the select is open.
`data-closed`	Present when the select is closed.
`data-align`	Indicates how the popup is aligned relative to specified side.
`data-side`	Indicates which side the popup is positioned relative to the trigger.
`data-starting-style`	Present when the select is animating in.
`data-ending-style`	Present when the select is animating out.

Select.Popup.StateHide

type SelectPopupState = {
  /** The side of the anchor the component is placed on. */
  side: 'top' | 'bottom' | 'left' | 'right' | 'inline-end' | 'inline-start' | 'none';
  /** The alignment of the component relative to the anchor. */
  align: 'start' | 'center' | 'end';
  /** Whether the component is open. */
  open: boolean;
  /** The transition status of the component. */
  transitionStatus: TransitionStatus;
}

List

A container for the select items. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.List.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.List.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.List.State, ) => ReactElement) | undefined

Select.List.PropsHide

Re-Export of List props as SelectListProps

Select.List.StateHide

type SelectListState = {}

Arrow

Displays an element positioned against the select popup anchor. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Arrow.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Arrow.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Arrow.State, ) => ReactElement) | undefined

data-open

Present when the select popup is open.

data-closed

Present when the select popup is closed.

data-uncentered

Present when the select arrow is uncentered.

data-align

Indicates how the popup is aligned relative to specified side.

data-side

Indicates which side the popup is positioned relative to the trigger.

Attribute	Description	-
`data-open`	Present when the select popup is open.
`data-closed`	Present when the select popup is closed.
`data-uncentered`	Present when the select arrow is uncentered.
`data-align`	Indicates how the popup is aligned relative to specified side.
`data-side`	Indicates which side the popup is positioned relative to the trigger.

Select.Arrow.PropsHide

Re-Export of Arrow props as SelectArrowProps

Select.Arrow.StateHide

type SelectArrowState = {
  /** Whether the select popup is currently open. */
  open: boolean;
  /** The side of the anchor the component is placed on. */
  side: 'top' | 'bottom' | 'left' | 'right' | 'inline-end' | 'inline-start' | 'none';
  /** The alignment of the component relative to the anchor. */
  align: 'start' | 'center' | 'end';
  /** Whether the arrow cannot be centered on the anchor. */
  uncentered: boolean;
}

Item

An individual option in the select popup. Renders a <div> element.

labelstring—

Name: label
Description: Specifies the text label to use when the item is matched during keyboard text navigation.

Defaults to the item text content if not provided.
Type: string | undefined

valueanynull

Name: value
Description: A unique value that identifies this select item.
Type: any | undefined
Default: null

nativeButtonbooleanfalse

Name: nativeButton
Description: Whether the component renders a native <button> element when replacing it via the render prop. Set to true if the rendered element is a native button.
Type: boolean | undefined
Default: false

disabledbooleanfalse

Name: disabled
Description: Whether the component should ignore user interaction.
Type: boolean | undefined
Default: false

childrenReact.ReactNode—

Name: children
Type: React.ReactNode | undefined

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Item.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Item.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Item.State, ) => ReactElement) | undefined

data-selected

Present when the select item is selected.

data-highlighted

Present when the select item is highlighted.

data-disabled

Present when the select item is disabled.

Attribute	Description	-
`data-selected`	Present when the select item is selected.
`data-highlighted`	Present when the select item is highlighted.
`data-disabled`	Present when the select item is disabled.

Select.Item.PropsHide

Re-Export of Item props as SelectItemProps

Select.Item.StateHide

type SelectItemState = {
  /** Whether the item should ignore user interaction. */
  disabled: boolean;
  /** Whether the item is selected. */
  selected: boolean;
  /** Whether the item is highlighted. */
  highlighted: boolean;
}

ItemText

A text label of the select item. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.ItemText.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.ItemText.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.ItemText.State, ) => ReactElement) | undefined

Select.ItemText.PropsHide

Re-Export of ItemText props as SelectItemTextProps

Select.ItemText.StateHide

type SelectItemTextState = {}

ItemIndicator

Indicates whether the select item is selected. Renders a <span> element.

childrenReact.ReactNode—

Name: children
Type: React.ReactNode | undefined

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | (( state: Select.ItemIndicator.State, ) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.ItemIndicator.State, ) => React.CSSProperties | undefined) | undefined

keepMountedboolean—

Name: keepMounted
Description: Whether to keep the HTML element in the DOM when the item is not selected.
Type: boolean | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.ItemIndicator.State, ) => ReactElement) | undefined

data-starting-style

Present when the indicator is animating in.

data-ending-style

Present when the indicator is animating out.

Attribute	Description	-
`data-starting-style`	Present when the indicator is animating in.
`data-ending-style`	Present when the indicator is animating out.

Select.ItemIndicator.PropsHide

Re-Export of ItemIndicator props as SelectItemIndicatorProps

Select.ItemIndicator.StateHide

type SelectItemIndicatorState = {
  /** Whether the item is selected. */
  selected: boolean;
  /** The transition status of the component. */
  transitionStatus: TransitionStatus;
}

Group

Groups related select items with the corresponding label. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.Group.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.Group.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.Group.State, ) => ReactElement) | undefined

Select.Group.PropsHide

Re-Export of Group props as SelectGroupProps

Select.Group.StateHide

type SelectGroupState = {}

GroupLabel

An accessible label that is automatically associated with its parent group. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Select.GroupLabel.State) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.GroupLabel.State, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.GroupLabel.State, ) => ReactElement) | undefined

Select.GroupLabel.PropsHide

Re-Export of GroupLabel props as SelectGroupLabelProps

Select.GroupLabel.StateHide

type SelectGroupLabelState = {}

ScrollUpArrow

An element that scrolls the select popup up when hovered. Does not render when using touch input. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | (( state: Select.ScrollUpArrow.State, ) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.ScrollUpArrow.State, ) => React.CSSProperties | undefined) | undefined

keepMountedbooleanfalse

Name: keepMounted
Description: Whether to keep the HTML element in the DOM while the select popup is not scrollable.
Type: boolean | undefined
Default: false

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.ScrollUpArrow.State, ) => ReactElement) | undefined

data-direction

Indicates the direction of the scroll arrow.

data-side

Indicates which side the popup is positioned relative to the trigger.

data-visible

Present when the scroll arrow is visible.

data-starting-style

Present when the scroll arrow is animating in.

data-ending-style

Present when the scroll arrow is animating out.

Attribute	Description	-
`data-direction`	Indicates the direction of the scroll arrow.
`data-side`	Indicates which side the popup is positioned relative to the trigger.
`data-visible`	Present when the scroll arrow is visible.
`data-starting-style`	Present when the scroll arrow is animating in.
`data-ending-style`	Present when the scroll arrow is animating out.

Select.ScrollUpArrow.PropsHide

Re-Export of ScrollUpArrow props as SelectScrollUpArrowProps

Select.ScrollUpArrow.StateHide

type SelectScrollUpArrowState = {}

ScrollDownArrow

An element that scrolls the select popup down when hovered. Does not render when using touch input. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | (( state: Select.ScrollDownArrow.State, ) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Select.ScrollDownArrow.State, ) => React.CSSProperties | undefined) | undefined

keepMountedbooleanfalse

Name: keepMounted
Description: Whether to keep the HTML element in the DOM while the select popup is not scrollable.
Type: boolean | undefined
Default: false

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Select.ScrollDownArrow.State, ) => ReactElement) | undefined

data-direction

Indicates the direction of the scroll arrow.

data-side

Indicates which side the popup is positioned relative to the trigger.

data-visible

Present when the scroll arrow is visible.

data-starting-style

Present when the scroll arrow is animating in.

data-ending-style

Present when the scroll arrow is animating out.

Attribute	Description	-
`data-direction`	Indicates the direction of the scroll arrow.
`data-side`	Indicates which side the popup is positioned relative to the trigger.
`data-visible`	Present when the scroll arrow is visible.
`data-starting-style`	Present when the scroll arrow is animating in.
`data-ending-style`	Present when the scroll arrow is animating out.

Select.ScrollDownArrow.PropsHide

Re-Export of ScrollDownArrow props as SelectScrollDownArrowProps

Select.ScrollDownArrow.StateHide

type SelectScrollDownArrowState = {}

Separator

A separator element accessible to screen readers. Renders a <div> element.

orientationOrientation'horizontal'

Name: orientation
Description: The orientation of the separator.
Type: 'horizontal' | 'vertical' | undefined
Default: 'horizontal'

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: SeparatorState) => string | undefined) | undefined

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: SeparatorState, ) => React.CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: SeparatorState, ) => ReactElement) | undefined

Select.Separator.PropsHide

Re-Export of Separator props as SelectSeparatorProps

Select.Separator.StateHide

type SelectSeparatorState = {
  /** The orientation of the separator. */
  orientation: 'horizontal' | 'vertical';
}

Select

Select.Root.PropsHide

Select.Root.StateHide

Select.Root.ActionsHide

Select.Root.ChangeEventReasonHide

Select.Root.ChangeEventDetailsHide

Select.Label.PropsHide

Select.Label.StateHide

Select.Trigger.PropsHide

Select.Trigger.StateHide

Select.Value.PropsHide

Select.Value.StateHide

Select.Icon.PropsHide

Select.Icon.StateHide

Select.Backdrop.PropsHide

Select.Backdrop.StateHide

Select.Portal.PropsHide

Select.Portal.StateHide

Select.Positioner.PropsHide

Select.Positioner.StateHide

Select.Popup.PropsHide

Select.Popup.StateHide

Select.List.PropsHide

Select.List.StateHide

Select.Arrow.PropsHide

Select.Arrow.StateHide

Select.Item.PropsHide

Select.Item.StateHide

Select.ItemText.PropsHide

Select.ItemText.StateHide

Select.ItemIndicator.PropsHide

Select.ItemIndicator.StateHide

Select.Group.PropsHide

Select.Group.StateHide

Select.GroupLabel.PropsHide

Select.GroupLabel.StateHide

Select.ScrollUpArrow.PropsHide

Select.ScrollUpArrow.StateHide

Select.ScrollDownArrow.PropsHide

Select.ScrollDownArrow.StateHide

Select.Separator.PropsHide

Select.Separator.StateHide