我想1按钮点击复制textarea id=chatgpt-response placeholder=的内容成功的话显示复制成功字体为红色显示在2的 div class=ui menu mt-30里面重新代码1 button class=ui button复制结果button2 body header class=ui sticky menu id=sticky-header

<p><button class="ui button" onclick="copyResponse()">复制结果</button></p>
<script>
function copyResponse() {
  var response = document.getElementById("chatgpt-response");
  response.select();
  document.execCommand("copy");
  var copyBtn = document.querySelector("button.ui.button");
  copyBtn.style.color = "red";
  var resultDiv = document.querySelector("div#result");
  resultDiv.innerText = "复制成功！";
}
</script>