fixes #115

src-ui/src/app/pipes/document-title.pipe.ts

@@ -0,0 +1,16 @@
+import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'documentTitle'
+})
+export class DocumentTitlePipe implements PipeTransform {
+
+  transform(value: string): unknown {
+    if (value) {
+      return value
+    } else {
+      return "(no title)"
+    }
+  }
+
+}