MediaWiki:Common.js

// Replace Wikidata IDs with their [label, description]
if ( $( '.wb-external-id' ).length > 0 ) {
	mw.loader.using( 'mediawiki.ForeignApi', function() {
		$( '.wb-external-id' ).each( function() {
			if ( $( this ).attr( 'href' ).lastIndexOf( 'https://www.wikidata.org', 0 ) === 0 ) {
				var wikidataApi = new mw.ForeignApi( 'https://www.wikidata.org/w/api.php', {
						anonymous: true,
						parameters: { 'origin': '*' },
						ajax: { timeout: 10000 }
					} ),
					lang = mw.config.get( 'wgUserLanguage' ),
					node = $( this );
				wikidataApi.get( {
					'action': 'wbgetentities',
					'format': 'json',
					'ids': node.text(),
					'props': 'labels|descriptions',
					'languages': lang,
					'languagefallback': 1,
					'origin': '*'
				} ).then( function( data ) {
                                        
					var entity = data.entities[ node.text() ],
						label = ( entity.labels[ lang ] !== undefined ? entity.labels[ lang ].value + ' <i>(' + node.text() + ')</i>' : node.text() ),
						description = ( entity.descriptions[ lang ] !== undefined ? '<small>' + entity.descriptions[ lang ].value + '</small>' : '' );
					
					node.html( label + '<br>' + description )
				} );
			}
		} );
	} );
}