fix: calculate heading after latex (closes #719)

quartz.config.ts

@@ -45,7 +45,6 @@ const config: QuartzConfig = {
   plugins: {
     transformers: [
       Plugin.FrontMatter(),
-      Plugin.TableOfContents(),
       Plugin.CreatedModifiedDate({
         // you can add 'git' here for last modified from Git
         // if you do rely on git for dates, ensure defaultDateType is 'modified'
@@ -55,6 +54,7 @@ const config: QuartzConfig = {
       Plugin.SyntaxHighlighting(),
       Plugin.ObsidianFlavoredMarkdown({ enableInHtmlEmbed: false }),
       Plugin.GitHubFlavoredMarkdown(),
+      Plugin.TableOfContents(),
       Plugin.CrawlLinks({ markdownLinkResolution: "shortest" }),
       Plugin.Description(),
     ],

quartz/plugins/transformers/toc.ts

@@ -26,6 +26,7 @@ interface TocEntry {
 }
 
 const regexMdLinks = new RegExp(/\[([^\[]+)\](\(.*\))/, "g")
+const slugAnchor = new Slugger()
 export const TableOfContents: QuartzTransformerPlugin<Partial<Options> | undefined> = (
   userOpts,
 ) => {
@@ -38,7 +39,7 @@ export const TableOfContents: QuartzTransformerPlugin<Partial<Options> | undefin
           return async (tree: Root, file) => {
             const display = file.data.frontmatter?.enableToc ?? opts.showByDefault
             if (display) {
-              const slugAnchor = new Slugger()
+              slugAnchor.reset()
               const toc: TocEntry[] = []
               let highestDepth: number = opts.maxDepth
               visit(tree, "heading", (node) => {