JavaScript 弹窗

<!-- 打开弹窗按钮 -->
<button id="myBtn">打开弹窗</button>
 
<!-- 弹窗 -->
<div id="myModal" class="modal">
 
  <!-- 弹窗内容 -->
  <div class="modal-content">
    <span class="close">&times;</span>
    <p>弹窗中的文本...</p>
  </div>
 
</div>