@wordpress/editor/src/components/theme-support-check/index.js

Enhanced block editor for WordPress posts.

/**
 * External dependencies
 */
import { castArray, includes, isArray, get, some } from 'lodash';

/**
 * WordPress dependencies
 */
import { withSelect } from '@wordpress/data';

export function ThemeSupportCheck( {
	themeSupports,
	children,
	postType,
	supportKeys,
} ) {
	const isSupported = some( castArray( supportKeys ), ( key ) => {
		const supported = get( themeSupports, [ key ], false );
		// 'post-thumbnails' can be boolean or an array of post types.
		// In the latter case, we need to verify `postType` exists
		// within `supported`. If `postType` isn't passed, then the check
		// should fail.
		if ( 'post-thumbnails' === key && isArray( supported ) ) {
			return includes( supported, postType );
		}
		return supported;
	} );

	if ( ! isSupported ) {
		return null;
	}

	return children;
}

export default withSelect( ( select ) => {
	const { getThemeSupports } = select( 'core' );
	const { getEditedPostAttribute } = select( 'core/editor' );
	return {
		postType: getEditedPostAttribute( 'type' ),
		themeSupports: getThemeSupports(),
	};
} )( ThemeSupportCheck );