fix: allow double hashtags, close #9

index.d.ts

@@ -0,0 +1,2 @@
+import lintRule from "./index.js";
+export default lintRule;

index.js

@@ -1,18 +1,37 @@
-const normalizeUrl = require('normalize-url');
-const rule = require('unified-lint-rule');
-var visit = require('unist-util-visit')
+/**
+ * @typedef {import('unist').Node} Node
+ * @typedef {import('vfile').VFile} VFile
+ */
+import normalizeUrl from 'normalize-url';
+import { lintRule } from 'unified-lint-rule';
+import { visit } from 'unist-util-visit';
 
-module.exports = rule(
+export default lintRule(
   'remark-lint:double-link',
   processor,
 );
 
+/**
+ * Check for repeated links.
+ *
+ * @param {Node} tree
+ * @param {VFile} file
+ * @returns {void}
+ */
 function processor(tree, file) {
   const links = new Map();
 
-  visit(tree, 'link', node => {
+  /**
+   * @param {any} node
+   */
+  function visitor(node) {
+    const hashCount = node.url.split("#").length - 1
+    if (hashCount > 1) {
+      return
+    }
+
     const url = node.url.startsWith('#') ? node.url : normalizeUrl(node.url, {
-      removeDirectoryIndex: true,
+      removeDirectoryIndex: [/^index\.[a-z]+$/],
       stripHash: true,
       stripProtocol: true,
       // removeQueryParameters: [/\.*/i]
@@ -23,11 +42,14 @@ function processor(tree, file) {
     } else {
       links.set(url, [node])
     }
-  })
+  }
+
+  visit(tree, 'link', visitor)
 
   links.forEach(nodes => {
     if (nodes.length > 1) {
-      nodes.forEach(node => {
+      // @ts-ignore
+      nodes.forEach((node) => {
         file.message(node.url, node)
       })
     }