aboutdarkmode.js

let buttonText = document.getElementById("darkmode-button");
let theme = localStorage.getItem("theme");
//    let theme=localStorage.getItem('theme');
let para = document.getElementById("para");
let h1 = document.querySelector("h1");
console.log(para.innerText);

var bodyelem = document.body;

function darkmode() {
  localStorage.setItem("theme", "darkmode");
  let val = localStorage.getItem("theme");
  // bodyelem=document.body;
  bodyelem.classList.add(val);
  para.style.color = "white";
  h1.style.color = "white";
}

function lightmode() {
  //let bodyelem=document.body;
  localStorage.setItem("theme", "");
  let val = localStorage.getItem("theme");
  bodyelem.classList.value = val;
  para.style.color = "black";
  h1.style.color = "black";
  // localStorage.setItem('theme','');
}
if (theme == "darkmode") {
  darkmode();
}
buttonText.addEventListener("click", () => {
  theme = localStorage.getItem("theme");
  console.log(theme);
  if (theme === "darkmode") {
    lightmode();
  } else {
    darkmode();
  }
});