HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>innerHTML clear</title>
  <style>body{font-family:system-ui,sans-serif;padding:1.5rem;} #panel{border:1px solid #ccc;padding:1rem;margin:1rem 0;} pre{border:1px solid #ccc;padding:0.75rem;}</style>
</head>
<body>
  <div id="panel"></div>
  <button id="load">Load content</button>
  <button id="clear">panel.innerHTML = ""</button>
  <pre id="out"></pre>
  <script>
    var panel = document.getElementById("panel");
    document.getElementById("load").addEventListener("click", function () {
      panel.innerHTML = "<p>Loaded</p><button>Go</button>";
      document.getElementById("out").textContent = "Loaded — children: " + panel.childElementCount;
    });
    document.getElementById("clear").addEventListener("click", function () {
      panel.innerHTML = "";
      document.getElementById("out").textContent = "Cleared — children: " + panel.childElementCount;
    });
  </script>
</body>
</html>

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Document.clear — innerHTML alternative (Try It)