@base-ui/react/esm/field/label/FieldLabel.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 { error } from '@base-ui/utils/error';
import { SafeReact } from '@base-ui/utils/safeReact';
import { useFieldRootContext } from "../../internals/field-root-context/FieldRootContext.js";
import { fieldValidityMapping } from "../../internals/field-constants/constants.js";
import { useRenderElement } from "../../internals/useRenderElement.js";
import { useLabelableContext } from "../../internals/labelable-provider/LabelableContext.js";
import { useLabel } from "../../internals/labelable-provider/useLabel.js";

/**
 * An accessible label that is automatically associated with the field control.
 * Renders a `<label>` element.
 *
 * Documentation: [Base UI Field](https://base-ui.com/react/components/field)
 */
export const FieldLabel = /*#__PURE__*/React.forwardRef(function FieldLabel(componentProps, forwardedRef) {
  const {
    render,
    className,
    style,
    id: idProp,
    nativeLabel = true,
    ...elementProps
  } = componentProps;
  const fieldRootContext = useFieldRootContext(false);
  const {
    labelId
  } = useLabelableContext();
  const labelRef = React.useRef(null);
  const labelProps = useLabel({
    id: labelId ?? idProp,
    native: nativeLabel
  });
  if (process.env.NODE_ENV !== 'production') {
    // eslint-disable-next-line react-hooks/rules-of-hooks
    React.useEffect(() => {
      if (!labelRef.current) {
        return;
      }
      const isLabelTag = labelRef.current.tagName === 'LABEL';
      if (nativeLabel) {
        if (!isLabelTag) {
          const ownerStackMessage = SafeReact.captureOwnerStack?.() || '';
          const message = '<Field.Label> expected a <label> element because the `nativeLabel` prop is true. ' + 'Rendering a non-<label> disables native label association, so `htmlFor` will not ' + 'work. Use a real <label> in the `render` prop, or set `nativeLabel` to `false`.';
          error(`${message}${ownerStackMessage}`);
        }
      } else if (isLabelTag) {
        const ownerStackMessage = SafeReact.captureOwnerStack?.() || '';
        const message = '<Field.Label> expected a non-<label> element because the `nativeLabel` prop is false. ' + 'Rendering a <label> assumes native label behavior while Base UI treats it as ' + 'non-native, which can cause unexpected pointer behavior. Use a non-<label> in the ' + '`render` prop, or set `nativeLabel` to `true`.';
        error(`${message}${ownerStackMessage}`);
      }
    }, [nativeLabel]);
  }
  const element = useRenderElement('label', componentProps, {
    ref: [forwardedRef, labelRef],
    state: fieldRootContext.state,
    props: [labelProps, elementProps],
    stateAttributesMapping: fieldValidityMapping
  });
  return element;
});
if (process.env.NODE_ENV !== "production") FieldLabel.displayName = "FieldLabel";