The error "Failed to recognize value undefined for property Regional_Indicator" in CKEditor 5 with React Hook Form occurs when you try to set the value of the CKEditor using undefined. This issue is most likely related to how you are integrating CKEditor 5 with React Hook Form.

To resolve this issue, make sure that you are providing a valid initial value for the CKEditor and that you handle the changes to the CKEditor's content correctly with React Hook Form. Here are the steps to fix the issue:

  1. Ensure Valid Initial Value: When initializing CKEditor, make sure to provide a valid initial value. CKEditor doesn't handle undefined values well, so you should set an empty string or any other valid value instead.
javascript
import React, { useEffect, useRef } from 'react'; import { CKEditor } from '@ckeditor/ckeditor5-react'; import ClassicEditor from '@ckeditor/ckeditor5-build-classic'; const MyEditor = ({ defaultValue }) => { const editorRef = useRef(); useEffect(() => { if (editorRef.current) { // Set the initial value after the editor has initialized editorRef.current.editor.setData(defaultValue || ''); } }, [defaultValue]); return <CKEditor editor={ClassicEditor} data={defaultValue || ''} ref={editorRef} />; }; export default MyEditor;
  1. Handle Changes with React Hook Form: If you are using React Hook Form to manage form state, make sure to handle the changes to the CKEditor's content correctly.
javascript
import React from 'react'; import { useForm, Controller } from 'react-hook-form'; import MyEditor from './MyEditor'; const MyForm = () => { const { control, handleSubmit } = useForm(); const onSubmit = (data) => { // Handle form submission with the data from CKEditor console.log(data); }; return ( <form onSubmit={handleSubmit(onSubmit)}> <Controller name="editorContent" control={control} defaultValue="" // Set the initial value here render={({ field }) => <MyEditor defaultValue={field.value} onChange={field.onChange} />} /> <button type="submit">Submit</button> </form> ); }; export default MyForm;

In the above example, we use the Controller component from React Hook Form to manage the CKEditor's content. We pass the initial value from the form state to the MyEditor component using the defaultValue prop. We also handle changes to the CKEditor's content using the field.onChange function provided by React Hook Form.

By ensuring that you provide a valid initial value and handle the CKEditor's content changes correctly with React Hook Form, you should be able to resolve the "Failed to recognize value undefined for property Regional_Indicator" issue in CKEditor 5 with React Hook Form.

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