From ec00a40aefca73596ab76e3ebe3a8e1129b43688 Mon Sep 17 00:00:00 2001
From: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Date: Tue, 27 Jan 2026 18:27:17 +0000
Subject: [PATCH] chore(deps): bump the production-dependencies group with 4 updates (#2289)

---
 quartz/plugins/transformers/toc.ts |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/quartz/plugins/transformers/toc.ts b/quartz/plugins/transformers/toc.ts
index 87031a9..791547b 100644
--- a/quartz/plugins/transformers/toc.ts
+++ b/quartz/plugins/transformers/toc.ts
@@ -2,18 +2,20 @@
 import { Root } from "mdast"
 import { visit } from "unist-util-visit"
 import { toString } from "mdast-util-to-string"
-import { slug as slugAnchor } from "github-slugger"
+import Slugger from "github-slugger"
 
 export interface Options {
   maxDepth: 1 | 2 | 3 | 4 | 5 | 6
-  minEntries: 1
+  minEntries: number
   showByDefault: boolean
+  collapseByDefault: boolean
 }
 
 const defaultOptions: Options = {
   maxDepth: 3,
   minEntries: 1,
   showByDefault: true,
+  collapseByDefault: false,
 }
 
 interface TocEntry {
@@ -22,9 +24,8 @@
   slug: string // this is just the anchor (#some-slug), not the canonical slug
 }
 
-export const TableOfContents: QuartzTransformerPlugin<Partial<Options> | undefined> = (
-  userOpts,
-) => {
+const slugAnchor = new Slugger()
+export const TableOfContents: QuartzTransformerPlugin<Partial<Options>> = (userOpts) => {
   const opts = { ...defaultOptions, ...userOpts }
   return {
     name: "TableOfContents",
@@ -34,6 +35,7 @@
           return async (tree: Root, file) => {
             const display = file.data.frontmatter?.enableToc ?? opts.showByDefault
             if (display) {
+              slugAnchor.reset()
               const toc: TocEntry[] = []
               let highestDepth: number = opts.maxDepth
               visit(tree, "heading", (node) => {
@@ -43,16 +45,17 @@
                   toc.push({
                     depth: node.depth,
                     text,
-                    slug: slugAnchor(text),
+                    slug: slugAnchor.slug(text),
                   })
                 }
               })
 
-              if (toc.length > opts.minEntries) {
+              if (toc.length > 0 && toc.length > opts.minEntries) {
                 file.data.toc = toc.map((entry) => ({
                   ...entry,
                   depth: entry.depth - highestDepth,
                 }))
+                file.data.collapseToc = opts.collapseByDefault
               }
             }
           }
@@ -65,5 +68,6 @@
 declare module "vfile" {
   interface DataMap {
     toc: TocEntry[]
+    collapseToc: boolean
   }
 }

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