HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>setAttribute name</title>
  <style>body{font-family:sans-serif;margin:1rem;} button{padding:0.5rem 1rem;}</style>
</head>
<body>
  <button type="button" id="hello_button">Some Text</button>
  <pre id="out"></pre>
  <script>
    var helloButton = document.getElementById("hello_button");
    helloButton.setAttribute("name", "helloButton");
    helloButton.innerText = helloButton.getAttribute("name");
    document.getElementById("out").textContent = helloButton.getAttribute("name");
  </script>
</body>
</html>

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Element.setAttribute — set name (Try It)