diff -r 99e342f9fb0c -r d19ba6045e82 client/src/components/NoteInput.js
--- a/client/src/components/NoteInput.js	Wed Dec 05 19:00:08 2018 +0100
+++ b/client/src/components/NoteInput.js	Wed Dec 05 23:52:25 2018 +0100
@@ -20,8 +20,12 @@
   }
 
   onEditorChange = (e) => {
+    let text = '';
+    if(this.editor) {
+      text = this.editor.asPlain();
+    }
     this.setState({
-      buttonDisabled: e.value.document === 0,
+      buttonDisabled: text.length === 0,
       startedAt: e.startedAt,
       finishedAt: e.finishedAt
     });