<div class="parent">

  <div class="example">
    <div class="pad">
      <p>Just some example stuff to copy here for testing.</p>
      <img src='https://images.unsplash.com/photo-1517451330947-7809dead78d5?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3MjE5NTIwNTN8&ixlib=rb-4.0.3&q=80&w=400' alt=''>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Ex, minima.</p>
    </div>
  </div>

  <div class="example">
    <button id="readCB">Read Clipboard</button>
    <div id="log"></div>
    <p class="message">If this doesn't work for you <a href="https://codepen.io/pen/debug/ZEdpZKv" target="_blank">try Debug Mode</a>.</p>
  </div>
</div>

body {
  height: 100vh;
  margin: 0;
  padding: 1rem;
  display: grid;
  place-items: center;
  background: #455a64;
  font-family: monospace;
}
.parent {
  display: flex;
  gap: 1rem;
}

.example {
  background: white;
  border-radius: 12px;
  overflow: clip;
  max-width: 45vw;
}
#readCB {
  margin: 2rem;
}
#log {
  background: black;
  color: white;
  padding: 2rem;
}

.pad {
  padding: 1rem;
}
img {
  max-width: 100%;
}

.message {
  text-align: center;
  padding-inline: 1rem;
}

* {
  box-sizing: border-box;
}

let $log = document.querySelector("#log");

document.querySelector("#readCB").addEventListener("click", async () => {
  let contents = await navigator.clipboard.read();

  for (let item of contents) {
    console.log("Types for this item: ", item.types);

    if (item.types.includes("text/html")) {
      let blob = await item.getType("text/html");
      let html = await blob.text();

      console.log(html);
      $log.innerHTML += html.replaceAll("<", "&lt;").replaceAll(">", "&gt;");
      $log.innerHTML += "<hr>";
    }

    if (item.types.includes("text/plain")) {
      let blob = await item.getType("text/plain");
      let text = await blob.text();

      console.log(text);
      $log.innerHTML += text.replaceAll("<", "&lt;").replaceAll(">", "&gt;");
      $log.innerHTML += "<hr>";
    }

    if (item.types.includes("image/png")) {
      // modified from MDN sample
      const pngImage = new Image();
      pngImage.alt = "PNG image from clipboard";
      const blob = await item.getType("image/png");
      pngImage.src = URL.createObjectURL(blob);
      $log.appendChild(pngImage);
    }
  }
});