feat: enable ==mark== syntax (#79)

.github/workflows/test.yml

@@ -23,6 +23,8 @@ jobs:
 
       - name: Setup Node
         uses: actions/setup-node@v3
+        with:
+          node-version: '16.x'
 
       - run: npm install
 

package.json

@@ -43,6 +43,7 @@
   "dependencies": {
     "katex": "^0.16.2",
     "markdown-it": "^13.0.1",
+    "markdown-it-mark": "^3.0.1",
     "uslug": "git+https://github.com/laurent22/uslug.git#emoji-support"
   },
   "files": [

src/markdownHeaders.test.ts

@@ -51,3 +51,17 @@ test('headers after code highlighting', () => {
     slug: 'header-3',
   });
 });
+
+test('headers after code highlighting', () => {
+  const headers = markdownHeaders(
+    readFileSync('./test/markdownHeaders_79.md', 'utf-8'),
+  );
+  expect(headers.length).toBe(1);
+  expect(headers[0]).toEqual({
+    html: '<mark>Like <strong>this</strong></mark>',
+    level: 1,
+    lineno: 0,
+    number: '1',
+    slug: 'like-this',
+  });
+});

src/markdownHeaders.ts

@@ -1,7 +1,8 @@
 import getSlug from './markdownSlug';
 
 const katex = require('katex');
-const markdownit = require('markdown-it')({ html: true });
+const markdownit = require('markdown-it')({ html: true })
+  .use(require('markdown-it-mark'));
 
 function isHeader(line: string, context: any) {
   // check code block

test/markdownHeaders_79.md

@@ -0,0 +1 @@
+# ==Like **this**==