2.1.2. Use State and Effect hooks to track attribute changes

track-attr-changes.js

const FrontendTracker = ( props ) => {
    // Code from 2.1.1. here...
    const [ attributes, setAttributes ] = useState( {
        block_id: 0,
    } );

    useEffect( () => {
        setAttributes( {
            ...dataAttributes,
        } );
    }, [] );
};