@mui/x-date-pickers/modern/internals/hooks/useValidation.js

The community edition of the Date and Time Picker components (MUI X).

import * as React from 'react';
import { useLocalizationContext } from './useUtils';
export function useValidation(props, validate, isSameError, defaultErrorState) {
  const {
    value,
    onError
  } = props;
  const adapter = useLocalizationContext();
  const previousValidationErrorRef = React.useRef(defaultErrorState);
  const validationError = validate({
    adapter,
    value,
    props
  });
  React.useEffect(() => {
    if (onError && !isSameError(validationError, previousValidationErrorRef.current)) {
      onError(validationError, value);
    }
    previousValidationErrorRef.current = validationError;
  }, [isSameError, onError, previousValidationErrorRef, validationError, value]);
  return validationError;
}