added no active tab fallback

final/js/main.js

@@ -72,6 +72,7 @@ tod.addEventListener('click', switchTabs)
 notes.addEventListener('click', switchTabs)
 //twentyFive.addEventListener('click', switchTabs)
 //fiftyTwo.addEventListener('click', switchTabs)
+if (localStorage.getItem('activeTab') == null) localStorage.setItem('activeTab', 'tod')
 $(`#${localStorage.getItem('activeTab')}`).classList.add('active')
 $(`#${localStorage.getItem('activeTab')}-section`).classList.remove('hidden')
 function switchTabs(e) {