a.ts

import {
  DOMParser,
  Element,
} from "https://deno.land/x/deno_dom/deno-dom-wasm.ts";

const doc = new DOMParser().parseFromString(
  `
  <h1>Hello World!</h1>
  <p>Hello from <a href="https://deno.land/">Deno!</a></p>
`,
  "text/html"
)!;

//console.log(doc.body);

const doc2 = doc.cloneNode(true);
console.log(doc2.body);