<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
Desofusca el siguiente codigo js: const header=document.getElementById("header");let lastPos=document.documentElement.scrollTop;window.addEventListener("scroll",(()=>{const e=document.documentElement.scrollTop;e>lastPos?e>header.offsetHeight&&(header.classList.add("-translate-y-full"),header.classList.remove("shadow-md")):(header.classList.remove("-translate-y-full"),header.classList.add("shadow-md")),lastPos=e}),!1);const menu=document.getElementById("menu"),searchBox=document.getElementById("search"),menuToggle=document.getElementById("menu-toggle");menuToggle.addEventListener("click",(()=>{menu.classList.toggle("hidden"),searchBox.classList.toggle("hidden")}),!1);const lazyImages=document.getElementsByClassName("lazy");document.addEventListener("DOMContentLoaded",(()=>{[...lazyImages].forEach((e=>{const t=e.dataset.src;e.setAttribute("src",t),e.removeAttribute("data-src")}))}),!1);class SearchPosts{async init(){const e=new URL(location.href).searchParams;this.start=Number(e.get("start"))||1,this.size=Number(e.get("size"))||12,this.posts=await fetch("../index.json").then((e=>e.json())),this.render(e.get("q"))}render(e){const t=document.getElementById("wrapper"),s=document.getElementById("searchbox"),n=document.getElementById("info");if(e="string"==typeof e?e.toLowerCase():"",history.replaceState(null,null,`?q=${e}&start=${this.start}&size=${this.size}`),s.value=e,t.innerHTML="",""===e)return void(n.textContent="Enter keywords in the search box above");const o=this.posts.filter((t=>-1!==t.title.toLowerCase().indexOf(e)));if(0===o.length)return void(n.textContent=`No results were found for "${e}"`);const a=this.size,r=this.start-1,l=o.slice(r,r+a),d=r+l.length,i=this.start<d||1!==this.start?`${this.start} to ${d}`:this.start,c=o.length>1?"s":"";n.textContent=`Showing ${i} of ${o.length} result${c} found for "${e}"`,l.forEach((e=>{const{url:s,title:n,date:o}=e;t.innerHTML+=`\n        <div class="w-full sm:w-1/2 md:w-1/3 self-stretch p-2 mb-2">\n          <a href="${s}">\n            <div class="rounded shadow-md h-full px-6 py-5">\n              <div class="font-semibold text-lg mb-2">${n}</div>\n              <p class="text-gray-700 mb-1" title="Published date">${o}</p>\n            </div>\n          </a>\n        </div>\n      `}))}}if("/search/"===location.pathname){const e=document.getElementById("searchbox"),t=new SearchPosts;t.init(),e.addEventListener("keyup",debounce((function(){t.render(this.value)}),400))}function debounce(e,t){let s,n=[];return function(...o){return new Promise((a=>{clearTimeout(s),s=setTimeout((()=>{s=null;const t=e.apply(this,o);for(a of n)a(t);n=[]}),t),n.push(a)}))}}<|im_end|>
<|im_start|>assistant
El código JavaScript desofuscado es el siguiente:

```javascript
const header = document.getElementById("header");
let lastPos = document.documentElement.scrollTop;
window.addEventListener("scroll", () => {
  const scrollPos = document.documentElement.scrollTop;
  if (scrollPos > lastPos) {
    if (scrollPos > header.offsetHeight) {
      header.classList.add("-translate-y-full");
      header.classList.remove("shadow-md");
    }
  } else {
    header.classList.remove("-translate-y-full");
    header.classList.add("shadow-md");
  }
  lastPos = scrollPos;
}, false);

const menu = document.getElementById("menu");
const searchBox = document.getElementById("search");
const menuToggle = document.getElementById("menu-toggle");
menuToggle.addEventListener("click", () => {
  menu.classList.toggle("hidden");
  searchBox.classList.toggle("hidden");
}, false);

const lazyImages = document.getElementsByClassName("lazy");
document.addEventListener("DOMContentLoaded", () => {
  [...lazyImages].forEach((img) => {
    const src = img.dataset.src;
    img.setAttribute("src", src);
    img.removeAttribute("data-src");
  });
}, false);

class SearchPosts {
  async init() {
    const params = new URL(location.href).searchParams;
    this.start = Number(params.get("start")) || 1;
    this.size = Number(params.get("size")) || 12;
    this.posts = await fetch("../index.json").then((response) => response.json());
    this.render(params.get("q"));
  }

  render(q) {
    const wrapper = document.getElementById("wrapper");
    const searchBox = document.getElementById("searchbox");
    const info = document.getElementById("info");
    if (typeof q === "string") {
      q = q.toLowerCase();
    } else {
      q = "";
    }
    history.replaceState(null, null, `?q=${q}&start=${this.start}&size=${this.size}`);
    searchBox.value = q;
    wrapper.innerHTML = "";
    if (q === "") {
      info.textContent = "Enter keywords in the search box above";
      return;
    }
    const filteredPosts = this.posts.filter((post) => post.title.toLowerCase().indexOf(q) !== -1);
    if (filteredPosts.length === 0) {
      info.textContent = `No results were found for "${q}"`;
      return;
    }
    const end = this.start - 1 + this.size;
    const displayed = this.start < end || this.start !== 1 ? `${this.start} to ${end}` : this.start;
    const plural = filteredPosts.length > 1 ? "s" : "";
    info.textContent = `Showing ${displayed} of ${filteredPosts.length} result${plural} found for "${q}"`;
    const slicedPosts = filteredPosts.slice(this.start - 1, end);
    slicedPosts.forEach((post) => {
      const { url, title, date } = post;
      wrapper.innerHTML += `
        <div class="w-full sm:w-1/2 md:w-1/3 self-stretch p-2 mb-2">
          <a href="${url}">
            <div class="rounded shadow-md h-full px-6 py-5">
              <div class="font-semibold text-lg mb-2">${title}</div>
              <p class="text-gray-700 mb-1" title="Published date">${date}</p>
            </div>
          </a>
        </div>
      `;
    });
  }
}
if ("/search/" === location.pathname) {
  const e = document.getElementById("searchbox"),
    t = new SearchPosts();
  t.init();
  e.addEventListener(
    "keyup",
    debounce(function () {
      t.render(this.value);
    }, 400)
  );
}

function debounce(e, t) {
  let s, n = [];
  return function (...o) {
    return new Promise((a) => {
      clearTimeout(s);
      s = setTimeout(() => {
        s = null;
        const t = e.apply(this, o);
        for (a of n) a(t);
        n = [];
      }, t);
      n.push(a);
    });
  }
}
```<|im_end|>
<|im_start|>user
Gracias por la respuesta 👍, lo probare para ver si funciona el codigo 😎 o si el resultado es diferente al obsfucado. En caso de que el resultado sea diferente al codigo que te proporcione al inicio, te lo dire para que lo corrigas. Pero de todas maneras gracias por la respuesta 🤗<|im_end|>
<|im_start|>assistant
De nada, estoy aquí para ayudarte en lo que necesites. Si encuentras alguna discrepancia en el resultado del código desofuscado, por favor házmelo saber y revisaremos juntos qué puede estar causando el problema. ¡Buena suerte!<|im_end|>
<|im_start|>user
Provee una refactorización del código anterior para que sea más legible y disminuya la cantidad de lineas de código. Sigue el estándar ECMA-262 9a Edición<|im_end|>
<|im_start|>assistant
const header = document.getElementById("header");
let lastPos = document.documentElement.scrollTop;
window.addEventListener("scroll", () => {
  const currentPos = document.documentElement.scrollTop;
  if (currentPos > lastPos) {
    if (currentPos > header.offsetHeight) {
      header.classList.add("-translate-y-full");
      header.classList.remove("shadow-md");
    }
  } else {
    header.classList.remove("-translate-y-full");
    header.classList.add("shadow-md");
  }
  lastPos = currentPos;
}, false);

const menu = document.getElementById("menu");
const searchBox = document.getElementById("search");
const menuToggle = document.getElementById("menu-toggle");

menuToggle.addEventListener("click", () => {
  menu.classList.toggle("hidden");
  searchBox.classList.toggle("hidden");
}, false);

const lazyImages = document.getElementsByClassName("lazy");

document.addEventListener("DOMContentLoaded", () => {
  [...lazyImages].forEach((img) => {
    const src = img.dataset.src;
    img.setAttribute("src", src);
    img.removeAttribute("data-src");
  });
}, false);

class SearchPosts {
  async init() {
   
if("/search/"===location.pathname){
  const e=document.getElementById("searchbox"),
        t=new SearchPosts;
  t.init(),
  e.addEventListener("keyup",debounce((function(){t.render(this.value)}),400))
}

function debounce(e,t){
  let s,n=[];
  return function(...o){
    return new Promise((a=>{
      clearTimeout(s),
      s=setTimeout((()=>{
        s=null;
        const t=e.apply(this,o);
        for(a of n)a(t);
        n=[]
      }),t),
      n.push(a)
    }))
  }
}<|im_end|>