ra-core/dist/form/validation/useNotifyIsFormInvalid.js

Core components of react-admin, a frontend Framework for building admin applications on top of REST services, using ES6, React

import { useEffect, useRef } from 'react';
import { useFormState } from 'react-hook-form';
import { useNotify } from "../../notification/index.js";
/**
 * This hook display an error message on submit in Form and SaveButton.
 *
 * We can't do the form validity check in the form submit handler
 * as the form state may not have been updated yet when onSubmit validation mode is enabled
 * or when the form hasn't been touched at all.
 */
export const useNotifyIsFormInvalid = (control, enabled = true) => {
    const { submitCount, errors } = useFormState(control ? { control } : undefined);
    const submitCountRef = useRef(submitCount);
    const notify = useNotify();
    useEffect(() => {
        // Checking the submit count allows us to only display the notification after users
        // tried to submit
        if (submitCount > submitCountRef.current && enabled) {
            submitCountRef.current = submitCount;
            if (Object.keys(errors).length > 0) {
                const serverError = typeof errors.root?.serverError?.message === 'string'
                    ? errors.root.serverError.message
                    : undefined;
                notify(serverError || 'ra.message.invalid_form', {
                    type: 'error',
                });
            }
        }
    }, [errors, submitCount, notify, enabled]);
};
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