Fix no rendering bug

assets/js/md/handlers.js

@@ -71,7 +71,7 @@ const renderHTML = async () => {
   const md = new remarkable.Remarkable({
     html: true,
   });
-  const markdownInput = document.getElementById("markdown-input");
+  const markdownInput = document.getElementById("markdown-input").value;
   const htmlOutput = document.getElementById("html-output");
   const newHtml = md.render(markdownInput);
   htmlOutput.innerHTML = newHtml;