diff --git a/utils/ShowdownExtensions.ts b/utils/ShowdownExtensions.ts
new file mode 100644
index 0000000..4541144
--- /dev/null
+++ b/utils/ShowdownExtensions.ts
@@ -0,0 +1,12 @@
+export const anchorHeader = {
+	type:    'output',
+	regex:   '<h\\d id="(.+?)">(.*?)<\\/h(\\d)>',
+	replace: function (__match, id:string, title:string, level:number) {
+
+		// github anchor style
+		const octicon_html = `<a class="anchor mr-1 align-middle" aria-hidden="true" href="#${id}"><svg fill="currentColor" class="octicon-link align-middle" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>`
+
+		return `<h${level} id="${id}">${octicon_html}${title}</h${level}>`
+	}
+}
+
diff --git a/utils/Tools.ts b/utils/Tools.ts
index fbfa9d8..b230431 100644
--- a/utils/Tools.ts
+++ b/utils/Tools.ts
@@ -47,4 +47,6 @@ export function checkBrowser(){
 	M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?']
 	if((tem= ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1])
 	return M.join(' ')
-}
\ No newline at end of file
+}
+
+export { anchorHeader } from './ShowdownExtensions'
\ No newline at end of file