[NNotepad] Fix webmachinelearning#253 e.target.close is not a functio…

…n error (webmachinelearning#254)

* [NNotepad] Fix webmachinelearning#253 e.target.close is not a function error

* check dialog for e.target directly

nnotepad/js/index.js

@@ -74,6 +74,7 @@ document.addEventListener('DOMContentLoaded', async (e) => {
   );
   $$('dialog').forEach((dialog) => {
     dialog.addEventListener('click', (e) => {
+      if (e.target !== dialog) return;
       const rect = e.target.getBoundingClientRect();
       if (
         e.clientY < rect.top ||