@base-ui/react/select/root/SelectRoot.js

Base UI is a library of headless ('unstyled') React components and low-level hooks. You gain complete control over your app's CSS and accessibility features.

"use strict";
'use client';

var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard").default;
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.SelectRoot = SelectRoot;
var React = _interopRequireWildcard(require("react"));
var _visuallyHidden = require("@base-ui/utils/visuallyHidden");
var _useMergedRefs = require("@base-ui/utils/useMergedRefs");
var _useRefWithInit = require("@base-ui/utils/useRefWithInit");
var _useOnFirstRender = require("@base-ui/utils/useOnFirstRender");
var _usePreviousValue = require("@base-ui/utils/usePreviousValue");
var _useControlled = require("@base-ui/utils/useControlled");
var _useIsoLayoutEffect = require("@base-ui/utils/useIsoLayoutEffect");
var _useStableCallback = require("@base-ui/utils/useStableCallback");
var _useValueAsRef = require("@base-ui/utils/useValueAsRef");
var _store = require("@base-ui/utils/store");
var _empty = require("@base-ui/utils/empty");
var _floatingUiReact = require("../../floating-ui-react");
var _SelectRootContext = require("./SelectRootContext");
var _FieldRootContext = require("../../internals/field-root-context/FieldRootContext");
var _useRegisterFieldControl = require("../../internals/field-register-control/useRegisterFieldControl");
var _useLabelableId = require("../../internals/labelable-provider/useLabelableId");
var _useTransitionStatus = require("../../internals/useTransitionStatus");
var _store2 = require("../store");
var _createBaseUIEventDetails = require("../../internals/createBaseUIEventDetails");
var _reasons = require("../../internals/reasons");
var _useOpenChangeComplete = require("../../internals/useOpenChangeComplete");
var _FormContext = require("../../internals/form-context/FormContext");
var _resolveValueLabel = require("../../internals/resolveValueLabel");
var _itemEquality = require("../../internals/itemEquality");
var _useValueChanged = require("../../internals/useValueChanged");
var _useOpenInteractionType = require("../../utils/useOpenInteractionType");
var _scrollEdges = require("../../utils/scrollEdges");
var _popups = require("../../utils/popups");
var _mergeProps = require("../../merge-props");
var _jsxRuntime = require("react/jsx-runtime");
/**
 * Groups all parts of the select.
 * Doesn't render its own HTML element.
 *
 * Documentation: [Base UI Select](https://base-ui.com/react/components/select)
 */
function SelectRoot(props) {
  const {
    id,
    value: valueProp,
    defaultValue = null,
    onValueChange,
    open: openProp,
    defaultOpen = false,
    onOpenChange,
    name: nameProp,
    form,
    autoComplete,
    disabled: disabledProp = false,
    readOnly = false,
    required = false,
    modal = true,
    actionsRef,
    inputRef,
    onOpenChangeComplete,
    items,
    multiple = false,
    itemToStringLabel,
    itemToStringValue,
    isItemEqualToValue = _itemEquality.defaultItemEquality,
    highlightItemOnHover = true,
    children
  } = props;
  const {
    clearErrors
  } = (0, _FormContext.useFormContext)();
  const {
    setDirty,
    setTouched,
    setFocused,
    shouldValidateOnChange,
    validityData,
    setFilled,
    name: fieldName,
    disabled: fieldDisabled,
    validation,
    validationMode
  } = (0, _FieldRootContext.useFieldRootContext)();
  const generatedId = (0, _useLabelableId.useLabelableId)({
    id
  });
  const disabled = fieldDisabled || disabledProp;
  const name = fieldName ?? nameProp;
  const [value, setValueUnwrapped] = (0, _useControlled.useControlled)({
    controlled: valueProp,
    default: multiple ? defaultValue ?? _empty.EMPTY_ARRAY : defaultValue,
    name: 'Select',
    state: 'value'
  });
  const [open, setOpenUnwrapped] = (0, _useControlled.useControlled)({
    controlled: openProp,
    default: defaultOpen,
    name: 'Select',
    state: 'open'
  });
  const listRef = React.useRef([]);
  const labelsRef = React.useRef([]);
  const popupRef = React.useRef(null);
  const scrollHandlerRef = React.useRef(null);
  const scrollArrowsMountedCountRef = React.useRef(0);
  const valueRef = React.useRef(null);
  const valuesRef = React.useRef([]);
  const typingRef = React.useRef(false);
  const keyboardActiveRef = React.useRef(false);
  const firstItemTextRef = React.useRef(null);
  const selectedItemTextRef = React.useRef(null);
  const selectionRef = React.useRef({
    allowSelectedMouseUp: false,
    allowUnselectedMouseUp: false,
    dragY: 0
  });
  const alignItemWithTriggerActiveRef = React.useRef(false);
  const {
    mounted,
    setMounted,
    transitionStatus
  } = (0, _useTransitionStatus.useTransitionStatus)(open);
  const {
    openMethod,
    triggerProps: interactionTypeProps
  } = (0, _useOpenInteractionType.useOpenInteractionType)(open);
  const store = (0, _useRefWithInit.useRefWithInit)(() => new _store.Store({
    id: generatedId,
    labelId: undefined,
    modal,
    multiple,
    itemToStringLabel,
    itemToStringValue,
    isItemEqualToValue,
    value,
    open,
    mounted,
    transitionStatus,
    items,
    forceMount: false,
    openMethod: null,
    activeIndex: null,
    selectedIndex: null,
    popupProps: {},
    triggerProps: {},
    triggerElement: null,
    positionerElement: null,
    listElement: null,
    popupSide: null,
    scrollUpArrowVisible: false,
    scrollDownArrowVisible: false,
    hasScrollArrows: false
  })).current;
  const activeIndex = (0, _store.useStore)(store, _store2.selectors.activeIndex);
  const selectedIndex = (0, _store.useStore)(store, _store2.selectors.selectedIndex);
  const triggerElement = (0, _store.useStore)(store, _store2.selectors.triggerElement);
  const positionerElement = (0, _store.useStore)(store, _store2.selectors.positionerElement);
  const previousOpenMethod = (0, _usePreviousValue.usePreviousValue)(openMethod);
  const renderedOpenMethod = openMethod ?? previousOpenMethod;
  const serializedValue = React.useMemo(() => {
    if (multiple && Array.isArray(value) && value.length === 0) {
      return '';
    }
    return (0, _resolveValueLabel.stringifyAsValue)(value, itemToStringValue);
  }, [multiple, value, itemToStringValue]);
  const fieldStringValue = React.useMemo(() => {
    if (multiple && Array.isArray(value)) {
      return value.map(currentValue => (0, _resolveValueLabel.stringifyAsValue)(currentValue, itemToStringValue));
    }
    return (0, _resolveValueLabel.stringifyAsValue)(value, itemToStringValue);
  }, [multiple, value, itemToStringValue]);
  const controlRef = (0, _useValueAsRef.useValueAsRef)(store.state.triggerElement);
  const getStringifiedValueForForm = (0, _useStableCallback.useStableCallback)(() => fieldStringValue);
  (0, _useRegisterFieldControl.useRegisterFieldControl)(controlRef, generatedId, value, getStringifiedValueForForm);
  const initialValueRef = React.useRef(value);
  const hasSelectedValue = multiple ? Array.isArray(value) && value.length > 0 : value != null;
  (0, _useIsoLayoutEffect.useIsoLayoutEffect)(() => {
    // Ensure the values and labels are registered for programmatic value changes.
    if (value !== initialValueRef.current) {
      store.set('forceMount', true);
    }
  }, [store, value]);
  (0, _useIsoLayoutEffect.useIsoLayoutEffect)(() => {
    setFilled(hasSelectedValue);
  }, [hasSelectedValue, setFilled]);
  (0, _useIsoLayoutEffect.useIsoLayoutEffect)(function syncSelectedIndex() {
    const registry = valuesRef.current;
    let nextIndex;
    if (multiple) {
      const currentValue = Array.isArray(value) ? value : [];
      if (currentValue.length === 0) {
        nextIndex = null;
      } else {
        const lastValue = currentValue[currentValue.length - 1];
        const lastIndex = (0, _itemEquality.findItemIndex)(registry, lastValue, isItemEqualToValue);
        nextIndex = lastIndex === -1 ? null : lastIndex;
      }
    } else {
      const index = (0, _itemEquality.findItemIndex)(registry, value, isItemEqualToValue);
      nextIndex = index === -1 ? null : index;
    }
    if (nextIndex === null) {
      selectedItemTextRef.current = null;
    }
    if (open) {
      return;
    }
    store.set('selectedIndex', nextIndex);
  }, [hasSelectedValue, multiple, open, value, valuesRef, isItemEqualToValue, store, selectedItemTextRef]);
  (0, _useValueChanged.useValueChanged)(value, () => {
    clearErrors(name);
    setDirty(value !== validityData.initialValue);
    if (shouldValidateOnChange()) {
      validation.commit(value);
    } else {
      validation.commit(value, true);
    }
  });
  const setOpen = (0, _useStableCallback.useStableCallback)((nextOpen, eventDetails) => {
    onOpenChange?.(nextOpen, eventDetails);
    if (eventDetails.isCanceled) {
      return;
    }
    setOpenUnwrapped(nextOpen);
    if (!nextOpen && (eventDetails.reason === _reasons.REASONS.focusOut || eventDetails.reason === _reasons.REASONS.outsidePress)) {
      setTouched(true);
      setFocused(false);
      if (validationMode === 'onBlur') {
        validation.commit(value);
      }
    }

    // The active index will sync to the last selected index on the next open.
    // Workaround `enableFocusInside` in Floating UI setting `tabindex=0` of a non-highlighted
    // option upon close when tabbing out due to `keepMounted=true`:
    // https://github.com/floating-ui/floating-ui/pull/3004/files#diff-962a7439cdeb09ea98d4b622a45d517bce07ad8c3f866e089bda05f4b0bbd875R194-R199
    // This otherwise causes options to retain `tabindex=0` incorrectly when the popup is closed
    // when tabbing outside.
    if (!nextOpen && store.state.activeIndex !== null) {
      const activeOption = listRef.current[store.state.activeIndex];
      // Wait for Floating UI's focus effect to have fired
      queueMicrotask(() => {
        activeOption?.setAttribute('tabindex', '-1');
      });
    }
  });
  const handleUnmount = (0, _useStableCallback.useStableCallback)(() => {
    setMounted(false);
    store.update({
      activeIndex: null,
      openMethod: null
    });
    onOpenChangeComplete?.(false);
  });
  (0, _useOpenChangeComplete.useOpenChangeComplete)({
    enabled: !actionsRef,
    open,
    ref: popupRef,
    onComplete() {
      if (!open) {
        handleUnmount();
      }
    }
  });
  React.useImperativeHandle(actionsRef, () => ({
    unmount: handleUnmount
  }), [handleUnmount]);
  const setValue = (0, _useStableCallback.useStableCallback)((nextValue, eventDetails) => {
    onValueChange?.(nextValue, eventDetails);
    if (eventDetails.isCanceled) {
      return;
    }
    setValueUnwrapped(nextValue);
  });
  const handleScrollArrowVisibility = (0, _useStableCallback.useStableCallback)(() => {
    const scroller = store.state.listElement || popupRef.current;
    if (!scroller) {
      return;
    }
    const maxScrollTop = (0, _scrollEdges.getMaxScrollOffset)(scroller.scrollHeight, scroller.clientHeight);
    const scrollTop = (0, _scrollEdges.normalizeScrollOffset)(scroller.scrollTop, maxScrollTop);
    const shouldShowUp = scrollTop > 0;
    const shouldShowDown = scrollTop < maxScrollTop;
    if (store.state.scrollUpArrowVisible !== shouldShowUp) {
      store.set('scrollUpArrowVisible', shouldShowUp);
    }
    if (store.state.scrollDownArrowVisible !== shouldShowDown) {
      store.set('scrollDownArrowVisible', shouldShowDown);
    }
  });
  const floatingContext = (0, _floatingUiReact.useFloatingRootContext)({
    open,
    onOpenChange: setOpen,
    elements: {
      reference: triggerElement,
      floating: positionerElement
    }
  });
  const click = (0, _floatingUiReact.useClick)(floatingContext, {
    enabled: !readOnly && !disabled,
    event: 'mousedown'
  });
  const dismiss = (0, _floatingUiReact.useDismiss)(floatingContext);
  const listNavigation = (0, _floatingUiReact.useListNavigation)(floatingContext, {
    enabled: !readOnly && !disabled,
    listRef,
    activeIndex,
    selectedIndex,
    disabledIndices: _empty.EMPTY_ARRAY,
    onNavigate(nextActiveIndex) {
      // Retain the highlight while transitioning out.
      if (nextActiveIndex === null && !open) {
        return;
      }
      store.set('activeIndex', nextActiveIndex);
    },
    focusItemOnHover: highlightItemOnHover
  });
  const typeahead = (0, _floatingUiReact.useTypeahead)(floatingContext, {
    enabled: !readOnly && !disabled && (open || !multiple),
    listRef: labelsRef,
    activeIndex,
    selectedIndex,
    onMatch(index) {
      if (open) {
        store.set('activeIndex', index);
      } else {
        setValue(valuesRef.current[index], (0, _createBaseUIEventDetails.createChangeEventDetails)('none'));
      }
    },
    onTyping(typing) {
      typingRef.current = typing;
    }
  });
  const mergedTriggerProps = React.useMemo(() => {
    const triggerInteractionProps = (0, _mergeProps.mergeProps)(typeahead.reference, listNavigation.reference, dismiss.reference, click.reference, interactionTypeProps);
    if (generatedId) {
      triggerInteractionProps.id = generatedId;
    }
    return triggerInteractionProps;
  }, [click.reference, typeahead.reference, listNavigation.reference, dismiss.reference, interactionTypeProps, generatedId]);
  const popupProps = React.useMemo(() => (0, _mergeProps.mergeProps)(_popups.FOCUSABLE_POPUP_PROPS, typeahead.floating, listNavigation.floating, dismiss.floating), [typeahead.floating, listNavigation.floating, dismiss.floating]);
  const itemProps = listNavigation.item ?? _empty.EMPTY_OBJECT;
  (0, _useOnFirstRender.useOnFirstRender)(() => {
    store.update({
      popupProps,
      triggerProps: mergedTriggerProps
    });
  });
  (0, _useIsoLayoutEffect.useIsoLayoutEffect)(() => {
    store.update({
      id: generatedId,
      modal,
      multiple,
      value,
      open,
      mounted,
      transitionStatus,
      popupProps,
      triggerProps: mergedTriggerProps,
      items,
      itemToStringLabel,
      itemToStringValue,
      isItemEqualToValue,
      openMethod: renderedOpenMethod
    });
  }, [store, generatedId, modal, multiple, value, open, mounted, transitionStatus, popupProps, mergedTriggerProps, items, itemToStringLabel, itemToStringValue, isItemEqualToValue, renderedOpenMethod]);
  const contextValue = React.useMemo(() => ({
    store,
    name,
    required,
    disabled,
    readOnly,
    multiple,
    highlightItemOnHover,
    setValue,
    setOpen,
    listRef,
    popupRef,
    scrollHandlerRef,
    handleScrollArrowVisibility,
    scrollArrowsMountedCountRef,
    itemProps,
    events: floatingContext.context.events,
    valueRef,
    valuesRef,
    labelsRef,
    typingRef,
    selectionRef,
    firstItemTextRef,
    selectedItemTextRef,
    validation,
    onOpenChangeComplete,
    keyboardActiveRef,
    alignItemWithTriggerActiveRef,
    initialValueRef
  }), [store, name, required, disabled, readOnly, multiple, highlightItemOnHover, setValue, setOpen, itemProps, floatingContext.context.events, validation, onOpenChangeComplete, handleScrollArrowVisibility]);
  const ref = (0, _useMergedRefs.useMergedRefs)(inputRef, validation.inputRef);
  const hasMultipleSelection = multiple && Array.isArray(value) && value.length > 0;
  const hiddenInputName = multiple ? undefined : name;
  const hiddenInputs = React.useMemo(() => {
    if (!multiple || !Array.isArray(value) || !name) {
      return null;
    }
    return value.map(v => {
      const currentSerializedValue = (0, _resolveValueLabel.stringifyAsValue)(v, itemToStringValue);
      return /*#__PURE__*/(0, _jsxRuntime.jsx)("input", {
        type: "hidden",
        form: form,
        name: name,
        value: currentSerializedValue
      }, currentSerializedValue);
    });
  }, [multiple, value, form, name, itemToStringValue]);
  return /*#__PURE__*/(0, _jsxRuntime.jsx)(_SelectRootContext.SelectRootContext.Provider, {
    value: contextValue,
    children: /*#__PURE__*/(0, _jsxRuntime.jsxs)(_SelectRootContext.SelectFloatingContext.Provider, {
      value: floatingContext,
      children: [children, /*#__PURE__*/(0, _jsxRuntime.jsx)("input", {
        ...validation.getInputValidationProps({
          onFocus() {
            // Move focus to the trigger element when the hidden input is focused.
            store.state.triggerElement?.focus({
              // Supported in Chrome from 144 (January 2026)
              focusVisible: true
            });
          },
          // Handle browser autofill.
          onChange(event) {
            // Workaround for https://github.com/facebook/react/issues/9023
            if (event.nativeEvent.defaultPrevented || disabled || readOnly) {
              // Outside Field.Root, the event is not wrapped by mergeProps.
              event.preventBaseUIHandler?.();
              return;
            }
            const nextValue = event.currentTarget.value;
            const details = (0, _createBaseUIEventDetails.createChangeEventDetails)(_reasons.REASONS.none, event.nativeEvent);
            function handleChange() {
              if (multiple) {
                // Browser autofill only writes a single scalar value.
                return;
              }

              // Handle single selection: match against registered values using serialization
              const matchingValue = valuesRef.current.find(v => {
                // Try matching by value first (e.g., "US" for country code)
                const candidateValue = (0, _resolveValueLabel.stringifyAsValue)(v, itemToStringValue);
                if (candidateValue.toLowerCase() === nextValue.toLowerCase()) {
                  return true;
                }
                // Also try matching by label for browser autofill compatibility
                // (browsers autofill with displayed text like "United States", not the underlying value)
                const candidateLabel = (0, _resolveValueLabel.stringifyAsLabel)(v, itemToStringLabel);
                if (candidateLabel.toLowerCase() === nextValue.toLowerCase()) {
                  return true;
                }
                return false;
              });
              if (matchingValue != null) {
                setDirty(matchingValue !== validityData.initialValue);
                setValue(matchingValue, details);
                if (shouldValidateOnChange()) {
                  validation.commit(matchingValue);
                }
              }
            }
            store.set('forceMount', true);
            queueMicrotask(handleChange);
          }
        }),
        id: generatedId && hiddenInputName == null ? `${generatedId}-hidden-input` : undefined,
        form: form,
        name: hiddenInputName,
        autoComplete: autoComplete,
        value: serializedValue,
        disabled: disabled,
        required: required && !hasMultipleSelection,
        readOnly: readOnly,
        ref: ref,
        style: name ? _visuallyHidden.visuallyHiddenInput : _visuallyHidden.visuallyHidden,
        tabIndex: -1,
        "aria-hidden": true,
        suppressHydrationWarning: true
      }), hiddenInputs]
    })
  });
}