强烈谴责fps格式内嵌katex-html，div和stylesheet的行为

packages/html2md/lib.ts

@@ -0,0 +1,17 @@
+import 'hydrooj';
+import TurndownService from 'turndown';
+import { JSDOM } from 'jsdom';
+
+const turndownService = new TurndownService();
+
+export function convertHTML(html: string) {
+    const DOM = new JSDOM(html);
+    const eles = DOM.window.document.querySelectorAll('span.katex-mathml');
+    eles.forEach((ele) => {
+        const MathML = ele.innerHTML;
+        ele.parentElement.replaceWith(MathML);
+    });
+    return turndownService.turndown(DOM.serialize());
+}
+
+global.Hydro.lib.convertHTML = convertHTML;