HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>prepend multi</title>
</head>
<body>
  <div id="item">Shoes</div>
  <button type="button" id="btn">Prepend badges</button>
  <pre id="out">—</pre>
  <script>
    document.getElementById("btn").onclick = function () {
      var item = document.getElementById("item");
      var badge = document.createElement("strong");
      badge.textContent = "NEW";
      var note = document.createElement("em");
      note.textContent = "sale";
      item.prepend(badge, " — ", note, " ");
      document.getElementById("out").textContent = item.innerHTML;
    };
  </script>
</body>
</html>

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Element.prepend — multiple nodes (Try It)