don't write empty string

Author: shmax

src/lib/output/plugins/JavascriptIndexPlugin.ts

@@ -69,7 +69,7 @@ export class JavascriptIndexPlugin extends RendererComponent {
                 kind: reflection.kind,
                 name: reflection.name,
                 url: reflection.url,
-                classes: reflection.cssClasses ?? "",
+                classes: reflection.cssClasses,
                 categories: (reflection.categories ?? []).map(
                     (category) => category.title
                 ),

src/lib/output/themes/default/assets/typedoc/components/Search.ts

@@ -8,7 +8,7 @@ export interface IDocument {
     kind: number;
     name: string;
     url: string;
-    classes: string;
+    classes?: string;
     parent?: string;
     categories: Array<string>;
 }
@@ -229,7 +229,7 @@ function updateResults(
         }
 
         const item = document.createElement("li");
-        item.classList.value = row.classes;
+         item.classList.value = row.classes ?? '';
 
         const anchor = document.createElement("a");
         anchor.href = state.base + row.url;