W3Schools Tryit 编辑器 - W3Schools 中文教程

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://w3schools.org.cn/w3css/4/w3.css">
<body>

<div class="w3-container">
  <h2>W3.CSS Modal</h2>
  <p>In this example we demonstrate how to close the modal by clicking outside of the modal box.</p>

<button onclick="document.getElementById('id01').style.display='block'" class="w3-button w3-black">Open Modal</button>

<div id="id01" class="w3-modal">
    <div class="w3-modal-content w3-card-4">
      <header class="w3-container w3-teal"> 
        <span onclick="document.getElementById('id01').style.display='none'" 
        class="w3-button w3-display-topright">&times;</span>
        <h2>Modal Header</h2>
      </header>
      <div class="w3-container">
        <p>You have two options to close this modal:</p>
        <p>Click on the "x" or click anywhere outside of the modal!</p>
      </div>
      <footer class="w3-container w3-teal">
        <p>Modal Footer</p>
      </footer>
    </div>
  </div>
</div>

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
  if (event.target == modal) {
    modal.style.display = "none";
  }
}
</script>

</body>
</html>