revuo-weekly/js/main.js

var normal = document.getElementById("nav-menu");
var reverse = document.getElementById("nav-menu-left");

var icon = normal !== null ? normal : reverse;


const toggleSwitch = document.querySelector('.switch input[type="checkbox"]');
const currentTheme = localStorage.getItem('theme');

if (currentTheme) {
    document.documentElement.setAttribute('data-theme', currentTheme);
  
    if (currentTheme === 'dark') {
        toggleSwitch.checked = true;
    }
}

function switchTheme(e) {
    if (e.target.checked) {
        document.documentElement.setAttribute('data-theme', 'dark');
        localStorage.setItem('theme', 'dark');
    }
    else {        document.documentElement.setAttribute('data-theme', 'light');
          localStorage.setItem('theme', 'light');
    }    
}

toggleSwitch.addEventListener('change', switchTheme, false);



//const currentTheme = localStorage.getItem("theme");
//const btn = document.querySelector("switch");
//const prefersDarkScheme = window.matchMedia("(prefers-color-scheme: dark)");

// Toggle the "menu-open" % "menu-opn-left" classes
function toggle() {
	  var navRight = document.getElementById("nav");
	  var navLeft = document.getElementById("nav-left");
	  var nav = navRight !== null ? navRight : navLeft;

	  var button = document.getElementById("menu");
	  var site = document.getElementById("wrap");
	  
	  if (nav.className == "menu-open" || nav.className == "menu-open-left") {
	  	  nav.className = "";
	  	  button.className = "";
	  	  site.className = "";
	  } else if (reverse !== null) {
	  	  nav.className += "menu-open-left";
	  	  button.className += "btn-close";
	  	  site.className += "fixed";
	  } else {
	  	  nav.className += "menu-open";
	  	  button.className += "btn-close";
	  	  site.className += "fixed";
	    }
	}

// Ensures backward compatibility with IE old versions
function menuClick() {
	if (document.addEventListener && icon !== null) {
		icon.addEventListener('click', toggle);
	} else if (document.attachEvent && icon !== null) {
		icon.attachEvent('onclick', toggle);
	} else {
		return;
	}
}

//function toggledark(checkbox) {
  //var elementb = document.body;
  //var elementh = document.html;
  //elementh.classList.toggle("dark-theme");
  //elementb.classList.toggle("dark-theme");
//}

menuClick();