fix getAttribute exception in notes plugin #3285

hakimel · Oct 17, 2022 · fb68f1c · fb68f1c
1 parent 4681323
commit fb68f1c
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Showing 3 changed files with 3 additions and 3 deletions.
diff --git a/plugin/notes/notes.esm.js b/plugin/notes/notes.esm.js
diff --git a/plugin/notes/notes.js b/plugin/notes/notes.js
diff --git a/plugin/notes/plugin.js b/plugin/notes/plugin.js
@@ -148,7 +148,7 @@ const Plugin = () => {
 		// Look for notes defined in an aside element
 		if( notesElements ) {
 			messageData.notes = Array.from(notesElements).map( notesElement => notesElement.innerHTML ).join( '\n' );
-			messageData.markdown = typeof notesElements[0].getAttribute( 'data-markdown' ) === 'string';
+			messageData.markdown = notesElements[0] && typeof notesElements[0].getAttribute( 'data-markdown' ) === 'string';
 		}
 
 		speakerWindow.postMessage( JSON.stringify( messageData ), '*' );