diff --git a/src/assets/javascripts/components/toc/index.ts b/src/assets/javascripts/components/toc/index.ts
index a682aec87..02642fc5e 100644
--- a/src/assets/javascripts/components/toc/index.ts
+++ b/src/assets/javascripts/components/toc/index.ts
@@ -162,9 +162,7 @@ export function watchTableOfContents(
       }),
 
       /* Sort index by vertical offset (see https://bit.ly/30z6QSO) */
-      map(index => new Map([...index]
-        .sort(([, a], [, b]) => a - b)
-      )),
+      map(index => new Map([...index].sort(([, a], [, b]) => a - b))),
 
       /* Re-compute partition when viewport offset changes */
       switchMap(index => combineLatest([adjust$, viewport$])