如何在单选按钮单击时显示微调器

<input type="radio" name="radioBtn" id="radioBtn">
<div id="spinnerContainer"></div>

var radioBtn = document.getElementById("radioBtn");
var spinnerContainer = document.getElementById("spinnerContainer");

radioBtn.addEventListener("click", function() {
  if (radioBtn.checked) {
    spinnerContainer.style.display = "block";
  } else {
    spinnerContainer.style.display = "none";
  }
});

#spinnerContainer {
  display: none;
  width: 100px;
  height: 100px;
  border: 1px solid #ccc;
}

/* 定义微调器的样式 */