fix(challenges/xeact): add noscript warning

Signed-off-by: Xe Iaso <me@xeiaso.net>

lib/challenge/preact/js/xeact.js

@@ -115,6 +115,15 @@ const d = (ms) => {
   };
 };
 
+/**
+ * Parse the contents of a given HTML page element as JSON and
+ * return the results.
+ * 
+ * This is useful when using templ to pass complicated data from
+ * the server to the client via HTML[1].
+ * 
+ * [1]: https://templ.guide/syntax-and-usage/script-templates/#pass-server-side-data-to-the-client-in-a-html-attribute
+ */
 const j = (id) => JSON.parse(g(id).textContent);
 
 export { h, t, x, g, j, c, n, u, s, r, useState, d };