<div class="example">
  <button id="readCB">Read Clipboard</button>
  <div id="log"></div>
  <p>If this doesn't work for you <a href="https://codepen.io/pen/debug/OJeXgOL" target="_blank">try Debug Mode</a>.</p>
</div>
body {
  height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  background: #455a64;
  font-family: monospace;
}

.example {
  background: white;
  border-radius: 12px;
  overflow: clip;
  width: 75dvi;
}
#readCB {
  margin: 2rem;
}
#log {
  background: black;
  color: white;
  padding: 2rem;
}

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

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

document.querySelector("#readCB").addEventListener("click", async () => {
  let contents = await navigator.clipboard.readText();
  console.log(contents);
  $log.innerText = contents;
});

External CSS

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External JavaScript

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