@base-ui/react/esm/select/value/SelectValue.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 client';

import * as React from 'react';
import { useStore } from '@base-ui/utils/store';
import { useRenderElement } from "../../utils/useRenderElement.js";
import { useSelectRootContext } from "../root/SelectRootContext.js";
import { resolveMultipleLabels, resolveSelectedLabel } from "../../utils/resolveValueLabel.js";
import { selectors } from "../store.js";
const stateAttributesMapping = {
  value: () => null
};

/**
 * A text label of the currently selected item.
 * Renders a `<span>` element.
 *
 * Documentation: [Base UI Select](https://base-ui.com/react/components/select)
 */
export const SelectValue = /*#__PURE__*/React.forwardRef(function SelectValue(componentProps, forwardedRef) {
  const {
    className,
    render,
    children: childrenProp,
    placeholder,
    ...elementProps
  } = componentProps;
  const {
    store,
    valueRef
  } = useSelectRootContext();
  const value = useStore(store, selectors.value);
  const items = useStore(store, selectors.items);
  const itemToStringLabel = useStore(store, selectors.itemToStringLabel);
  const hasSelectedValue = useStore(store, selectors.hasSelectedValue);
  const shouldCheckNullItemLabel = !hasSelectedValue && placeholder != null && childrenProp == null;
  const hasNullLabel = useStore(store, selectors.hasNullItemLabel, shouldCheckNullItemLabel);
  const state = {
    value,
    placeholder: !hasSelectedValue
  };
  let children = null;
  if (typeof childrenProp === 'function') {
    children = childrenProp(value);
  } else if (childrenProp != null) {
    children = childrenProp;
  } else if (!hasSelectedValue && placeholder != null && !hasNullLabel) {
    children = placeholder;
  } else if (Array.isArray(value)) {
    children = resolveMultipleLabels(value, items, itemToStringLabel);
  } else {
    children = resolveSelectedLabel(value, items, itemToStringLabel);
  }
  const element = useRenderElement('span', componentProps, {
    state,
    ref: [forwardedRef, valueRef],
    props: [{
      children
    }, elementProps],
    stateAttributesMapping
  });
  return element;
});
if (process.env.NODE_ENV !== "production") SelectValue.displayName = "SelectValue";