fix(bi-link): Invalidation of title reference

packages/markdown-it-bi-directional-links/src/index.test.ts

@@ -117,6 +117,22 @@ describe('markdown-it-bi-directional-links', () => {
     expect(rendered).toBe(`<p><a href="/foo bar.md#bar">foo bar</a></p>\n`)
   })
 
+  it('should render when without "foo" 1', () => {
+    const rendered = new MarkdownIt({ html: true })
+      .use(BiDirectionalLinks({ dir: testdataDir }))
+      .render(`[[#bar]]`)
+
+    expect(rendered).toBe(`<p><a href="#bar">bar</a></p>\n`)
+  })
+
+  it('should render when without "foo" 2', () => {
+    const rendered = new MarkdownIt({ html: true })
+      .use(BiDirectionalLinks({ dir: testdataDir }))
+      .render(`[[^bar]]`)
+
+    expect(rendered).toBe(`<p><a href="#^bar">bar</a></p>\n`)
+  })
+
   it('should render simple form with query strings', () => {
     const rendered = new MarkdownIt({ html: true })
       .use(BiDirectionalLinks({ dir: testdataDir }))

packages/markdown-it-bi-directional-links/src/index.ts

@@ -10,7 +10,7 @@ import { findBiDirectionalLinks, genAudio, genImage, genLink, genVideo } from '.
 
 /** it will match [[file]] and [[file|text]] */
 const biDirectionalLinkPattern = /!?\[\[([^|\]\n]+)(\|([^\]\n]+))?\]\](?!\()/
-/** it will match [[file]] and [[file|text]] but only at the start of the text */
+/** it will match [[file]] and [[file|text]], but only at the start of the text */
 // eslint-disable-next-line regexp/no-unused-capturing-group
 const biDirectionalLinkPatternWithStart = /^!?\[\[[^|\]\n]+(\|[^\]\n]+)?\]\](?!\()/
 
@@ -306,11 +306,21 @@ export const BiDirectionalLinks: (options?: BiDirectionalLinksOptions) => Plugin
       const isAudioRef = AUDIO_EXTENSIONS.some(ext => href.endsWith(ext))
 
       // Extract the pathname from the href
-      const parsedHref = new URL(href.startsWith('#') || href.startsWith('^') || href.startsWith('?') ? relative(rootDir, state.env.path) + href : href, 'https://a.com')
+      const parsedHref = new URL(href.startsWith('?') ? relative(rootDir, state.env.path) + href : href, 'https://a.com')
       // 1. Remove the leading slash since pathname always starts with a slash and we don't want it
       // 2. Decode the pathname since it is url-encoded
       const parsedPathname = decodeURIComponent(parsedHref.pathname.slice(1))
 
+      // If to self, direct return, no need to find and parse
+      const isToSelf = href.startsWith('#') || href.startsWith('^')
+      if (isToSelf) {
+        let resolvedNewHref = ''
+        parsedHref.hash = href
+        resolvedNewHref = resolvedNewHref + parsedHref.search + parsedHref.hash
+        genLink(state, resolvedNewHref, href.slice(1), md, href, link)
+        return true
+      }
+
       // Convert href to os specific path for matching and resolving
       let osSpecificHref = parsedPathname.split('/').join(sep)