diff --git a/demo/pages/lang/main.ts b/demo/pages/lang/main.ts
index 0d7400f..0f77ee2 100644
--- a/demo/pages/lang/main.ts
+++ b/demo/pages/lang/main.ts
@@ -6,7 +6,7 @@ const options: Options = {
   type: 'multiple',
   selectionDatesMode: 'multiple-ranged',
   disableDatesGaps: true,
-  // disableDatesPast: true,
+  disableDatesPast: true,
   dateMin: '2021-02-01',
   dateMax: '2025-11-30',
   displayDatesOutside: false,
@@ -65,12 +65,11 @@ const options: Options = {
 };
 
 document.addEventListener('DOMContentLoaded', () => {
-  const calendar = new Calendar('#calendar', options);
+  const calendar = new Calendar('#calendar');
   calendar.init();
 
-  // const btnSetEl = document.querySelector('#set-options');
-  // btnSetEl?.addEventListener('click', () => {
-  //   calendar.set(options, { dates: false });
-  //   console.log(calendar);
-  // });
+  const btnSetEl = document.querySelector('#set-options');
+  btnSetEl?.addEventListener('click', () => {
+    calendar.set(options, { dates: false });
+  });
 });