transform: ( { value, citation, ...attrs } ) => {
// If there is no quote content, use the citation as the
// content of the resulting heading. A nonexistent citation
// will result in an empty heading.
if ( value === '<p></p>' ) {
return createBlock( 'core/heading', {
content: citation,
} );
}
const pieces = split( create( { html: value, multilineTag: 'p' } ), '\u2028' );
const quotePieces = pieces.slice( 1 );
return [
createBlock( 'core/heading', {
content: toHTMLString( { value: pieces[ 0 ] } ),
} ),
createBlock( 'core/quote', {
...attrs,
citation,
value: toHTMLString( {
value: quotePieces.length ? join( pieces.slice( 1 ), '\u2028' ) : create(),
multilineTag: 'p',
} ),
} ),
];
},
transform: ( attributes ) => {
return createBlock( 'core/quote', {
value: toHTMLString( {
value: join( attributes.map( ( { content } ) =>
create( { html: content } )
), '\u2028' ),
multilineTag: 'p',
} ),
} );
},