1.1. Unique Block Identifiers

unique-block-id.js

registerBlockType( 'rave/initiative-tracker', {
    title: __( 'Initiative Tracker', 'initiative-tracker' ),
    attributes: {
        id: {
            type: 'string',
            default: '',
        },
    },
    edit: ( props ) => {
        const {
            attributes: {
                id,
            },
            clientId,
            setAttributes,
        } = props;

        useEffect( () => {
            if ( 0 === id.length ) {
                setAttributes( {
                    id: clientId,
                } );
            }
        }, [] );
    },
    save: () => null,
} );