@mui/joy/modern/FormHelperText/FormHelperText.js

Joy UI is an open-source React component library that implements MUI's own design principles. It's comprehensive and can be used in production out of the box.

'use client';

import _extends from "@babel/runtime/helpers/esm/extends";
import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
const _excluded = ["children", "component", "slots", "slotProps"];
import * as React from 'react';
import PropTypes from 'prop-types';
import { unstable_useForkRef as useForkRef } from '@mui/utils';
import { unstable_composeClasses as composeClasses } from '@mui/base/composeClasses';
import { styled, useThemeProps } from '../styles';
import { getFormHelperTextUtilityClass } from './formHelperTextClasses';
import FormControlContext from '../FormControl/FormControlContext';
import formControlClasses from '../FormControl/formControlClasses';
import formLabelClasses from '../FormLabel/formLabelClasses';
import useSlot from '../utils/useSlot';
import { jsx as _jsx } from "react/jsx-runtime";
const useUtilityClasses = () => {
  const slots = {
    root: ['root']
  };
  return composeClasses(slots, getFormHelperTextUtilityClass, {});
};
const FormHelperTextRoot = styled('div', {
  name: 'JoyFormHelperText',
  slot: 'Root',
  overridesResolver: (props, styles) => styles.root
})(({
  theme
}) => ({
  '--Icon-fontSize': 'calc(var(--FormHelperText-lineHeight) * 1em)',
  display: 'flex',
  alignItems: 'center',
  gap: '2px',
  fontFamily: theme.vars.fontFamily.body,
  fontSize: `var(--FormHelperText-fontSize, ${theme.vars.fontSize.sm})`,
  lineHeight: `var(--FormHelperText-lineHeight, ${theme.vars.lineHeight.sm})`,
  color: `var(--FormHelperText-color, ${theme.vars.palette.text.tertiary})`,
  margin: 'var(--FormHelperText-margin, 0px)',
  [`.${formLabelClasses.root} + &`]: {
    '--FormHelperText-margin': '0px' // remove the margin if the helper text is next to the form label.
  },
  [`.${formControlClasses.error} &`]: {
    '--Icon-color': 'currentColor'
  }
}));
/**
 *
 * Demos:
 *
 * - [Input](https://mui.com/joy-ui/react-input/)
 *
 * API:
 *
 * - [FormHelperText API](https://mui.com/joy-ui/api/form-helper-text/)
 */
const FormHelperText = /*#__PURE__*/React.forwardRef(function FormHelperText(inProps, ref) {
  const props = useThemeProps({
    props: inProps,
    name: 'JoyFormHelperText'
  });
  const {
      children,
      component,
      slots = {},
      slotProps = {}
    } = props,
    other = _objectWithoutPropertiesLoose(props, _excluded);
  const rootRef = React.useRef(null);
  const handleRef = useForkRef(rootRef, ref);
  const formControl = React.useContext(FormControlContext);
  const setHelperText = formControl?.setHelperText;
  React.useEffect(() => {
    setHelperText?.(rootRef.current);
    return () => {
      setHelperText?.(null);
    };
  }, [setHelperText]);
  const classes = useUtilityClasses();
  const externalForwardedProps = _extends({}, other, {
    component,
    slots,
    slotProps
  });
  const [SlotRoot, rootProps] = useSlot('root', {
    ref: handleRef,
    elementType: FormHelperTextRoot,
    externalForwardedProps,
    ownerState: props,
    additionalProps: {
      as: component,
      id: formControl?.['aria-describedby']
    },
    className: classes.root
  });
  return /*#__PURE__*/_jsx(SlotRoot, _extends({}, rootProps, {
    children: children
  }));
});
process.env.NODE_ENV !== "production" ? FormHelperText.propTypes /* remove-proptypes */ = {
  // ┌────────────────────────────── Warning ──────────────────────────────┐
  // │ These PropTypes are generated from the TypeScript type definitions. │
  // │ To update them, edit the TypeScript types and run `pnpm proptypes`. │
  // └─────────────────────────────────────────────────────────────────────┘
  /**
   * The content of the component.
   */
  children: PropTypes.node,
  /**
   * The component used for the root node.
   * Either a string to use a HTML element or a component.
   */
  component: PropTypes.elementType,
  /**
   * The props used for each slot inside.
   * @default {}
   */
  slotProps: PropTypes.shape({
    root: PropTypes.oneOfType([PropTypes.func, PropTypes.object])
  }),
  /**
   * The components used for each slot inside.
   * @default {}
   */
  slots: PropTypes.shape({
    root: PropTypes.elementType
  }),
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx: PropTypes.oneOfType([PropTypes.arrayOf(PropTypes.oneOfType([PropTypes.func, PropTypes.object, PropTypes.bool])), PropTypes.func, PropTypes.object])
} : void 0;
export default FormHelperText;