Fix double render of Hierarchy header

Closes #2053.

CHANGELOG.md

@@ -9,6 +9,7 @@
 
 -   TypeDoc will now prefer comments on variable declarations over signature comments, #2042.
 -   Fixed double rendering of "Type Parameters" header, #2054.
+-   Fixed double rendering of "Hierarchy" header, #2053.
 -   Removed unused `widgets.png` and `[email protected]` files from generated assets folder.
 
 ## v0.23.14 (2022-09-03)

src/lib/output/themes/default/partials/hierarchy.tsx

@@ -2,20 +2,26 @@ import type { DefaultThemeRenderContext } from "../DefaultThemeRenderContext";
 import { JSX } from "../../../../utils";
 import type { DeclarationHierarchy } from "../../../../models";
 
-export const hierarchy = (context: DefaultThemeRenderContext, props: DeclarationHierarchy | undefined) => (
-    <>
-        {!!props && (
-            <section class="tsd-panel tsd-hierarchy">
-                <h4>Hierarchy</h4>
-                <ul class="tsd-hierarchy">
-                    {props.types.map((item, i, l) => (
-                        <li>
-                            {props.isTarget ? <span class="target">{item.toString()}</span> : context.type(item)}
-                            {i === l.length - 1 && !!props.next && context.hierarchy(props.next)}
-                        </li>
-                    ))}
-                </ul>
-            </section>
-        )}
-    </>
-);
+export function hierarchy(context: DefaultThemeRenderContext, props: DeclarationHierarchy | undefined) {
+    if (!props) return;
+
+    return (
+        <section class="tsd-panel tsd-hierarchy">
+            <h4>Hierarchy</h4>
+            {hierarchyList(context, props)}
+        </section>
+    );
+}
+
+function hierarchyList(context: DefaultThemeRenderContext, props: DeclarationHierarchy) {
+    return (
+        <ul class="tsd-hierarchy">
+            {props.types.map((item, i, l) => (
+                <li>
+                    {props.isTarget ? <span class="target">{item.toString()}</span> : context.type(item)}
+                    {i === l.length - 1 && !!props.next && hierarchyList(context, props.next)}
+                </li>
+            ))}
+        </ul>
+    );
+}