Addressed comments

frontend/models/Document.js

@@ -72,12 +72,13 @@ class Document {
     return [];
   }
 
-  @computed get allowSave(): boolean {
+  @computed get isEmpty(): boolean {
     // Check if the document title has been modified and user generated content exists
-    return (
-      this.text.replace(new RegExp(`^\#$`), '').trim().length > 0 &&
-      !this.isSaving
-    );
+    return this.text.replace(new RegExp(`^\#$`), '').trim().length === 0;
+  }
+
+  @computed get allowSave(): boolean {
+    return !this.isEmpty && !this.isSaving;
   }
 
   /* Actions */

frontend/scenes/Document/Document.js

@@ -104,7 +104,7 @@ type Props = {
   };
 
   onSave = async (redirect: boolean = false) => {
-    if (!get(this.document, 'allowSave')) return;
+    if (this.document && !this.document.allowSave) return;
     let document = this.document;
 
     if (!document) return;
@@ -221,7 +221,7 @@ type Props = {
                       ? <SaveAction
                           showCheckmark={this.state.showAsSaved}
                           onClick={this.onSave.bind(this, true)}
-                          disabled={!get(this.document, 'allowSave')}
+                          disabled={!(this.document && this.document.allowSave)}
                           isNew={!!isNew}
                         />
                       : <a onClick={this.onClickEdit}>Edit</a>}