➎ Get the url of the current featured image

gutenberg-snippets-5.js

const { select } = wp.data;
const { getMedia } = select( 'core' );
const { getEditedPostAttribute } = select( 'core/editor' );

const mediaId = getEditedPostAttribute('featured_media');
const mediaUrl = getMedia(mediaId).source_url;

console.log(mediaUrl);