diff --git a/src/js/dark-mode.js b/src/js/dark-mode.js
new file mode 100644
index 0000000..f386e3e
--- /dev/null
+++ b/src/js/dark-mode.js
@@ -0,0 +1,10 @@
+(() => {
+  document.body.addEventListener('click', (event) => {
+    const toggleButton = event.target.closest('[data-action="toggle-dark-mode"]');
+
+    if (!toggleButton) return;
+    
+    const isDark = document.documentElement.classList.toggle('dark');
+    localStorage.setItem('darkMode', isDark ? 'dark' : 'light');
+  });
+})();
\ No newline at end of file