尝试在将鼠标悬停在图像上时显示div。无法使其正常工作

<div class="image-container">
  <img src="image.jpg" alt="Image">
  <div class="overlay">This is the overlay content</div>
</div>

.image-container {
  position: relative;
  display: inline-block;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  color: #fff;
  display: none;
  justify-content: center;
  align-items: center;
}

.image-container:hover .overlay {
  display: flex;
}

<div class="overlay">
  <div class="content">
    <h2>Overlay Content</h2>
    <button id="btn">Click Me</button>
  </div>
</div>

document.getElementById("btn").addEventListener("click", function() {
  // 执行一些操作
});