script1.js

let sidebar = document.querySelector(".sidebar");
let closeBtn = document.querySelector("#btn");
let searchBtn = document.querySelector(".bx-search");

closeBtn.addEventListener("click", () => {
  sidebar.classList.toggle("open");
  menuBtnChange(); //calling the function(optional)
});

searchBtn.addEventListener("click", () => {
  // Sidebar open when you click on the search iocn
  sidebar.classList.toggle("open");
  menuBtnChange(); //calling the function(optional)
});

// following are the code to change sidebar button(optional)
function menuBtnChange() {
  if (sidebar.classList.contains("open")) {
    closeBtn.classList.replace("bx-menu", "bx-menu-alt-right"); //replacing the iocns class
  } else {
    closeBtn.classList.replace("bx-menu-alt-right", "bx-menu"); //replacing the iocns class
  }
}
const scrollbtn = document.getElementById("scrollbtn");
console.log(scrollbtn);
scrollbtn.addEventListener("click", myFunction);

function myFunction() {
  window.scrollTo({
    top: 0,
    left: 0,
    behavior: "smooth",
  });
}