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node_modules/marked-gfm-heading-id/src/index.js

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+import GithubSlugger from 'github-slugger';
+let slugger = new GithubSlugger();
+
+let headings = [];
+
+// unescape from marked helpers
+const unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
+/* istanbul ignore next */
+export function unescape(html) {
+  // explicitly match decimal, hex, and named HTML entities
+  return html.replace(unescapeTest, (_, n) => {
+    n = n.toLowerCase();
+    if (n === 'colon') return ':';
+    if (n.charAt(0) === '#') {
+      return n.charAt(1) === 'x'
+        ? String.fromCharCode(parseInt(n.substring(2), 16))
+        : String.fromCharCode(+n.substring(1));
+    }
+    return '';
+  });
+}
+
+export function gfmHeadingId({ prefix = '', globalSlugs = false } = {}) {
+  return {
+    headerIds: false, // prevent deprecation warning; remove this once headerIds option is removed
+    hooks: {
+      preprocess(src) {
+        if (!globalSlugs) {
+          resetHeadings();
+        }
+        return src;
+      },
+    },
+    useNewRenderer: true,
+    renderer: {
+      heading({ tokens, depth }) {
+        const text = this.parser.parseInline(tokens);
+        const raw = unescape(this.parser.parseInline(tokens, this.parser.textRenderer))
+          .trim()
+          .replace(/<[!\/a-z].*?>/gi, '');
+        const level = depth;
+        const id = `${prefix}${slugger.slug(raw.toLowerCase())}`;
+        const heading = { level, text, id, raw };
+        headings.push(heading);
+
+        return `<h${level} id="${id}">${text}</h${level}>\n`;
+      },
+    },
+  };
+}
+
+export function getHeadingList() {
+  return headings;
+}
+
+export function resetHeadings() {
+  headings = [];
+  slugger = new GithubSlugger();
+}