w3css 在线编辑器 | w3css代码测试

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

<div class="w3-sidebar w3-bar-block w3-card w3-animate-left" style="display:none" id="leftMenu">
  <button onclick="closeLeftMenu()" class="w3-bar-item w3-button w3-large">Close &times;</button>
  <a href="#" class="w3-bar-item w3-button">链接 1</a>
  <a href="#" class="w3-bar-item w3-button">链接 2</a>
  <a href="#" class="w3-bar-item w3-button">链接 3</a>
</div>

<div class="w3-sidebar w3-bar-block w3-card w3-animate-right" style="display:none;right:0;" id="rightMenu">
  <button onclick="closeRightMenu()" class="w3-bar-item w3-button w3-large">Close &times;</button>
  <a href="#" class="w3-bar-item w3-button">链接 1</a>
  <a href="#" class="w3-bar-item w3-button">链接 2</a>
  <a href="#" class="w3-bar-item w3-button">链接 3</a>
</div>

<div class="w3-container">
<p>在此示例中，我们演示了如何使用两侧导航。</p>
<p>我们创建了两个“菜单”按钮：一个用于从左侧打开侧面导航，一个用于从右侧打开。</p>
</div>
     
<script>
function openLeftMenu() {
  document.getElementById("leftMenu").style.display = "block";
}

function closeLeftMenu() {
  document.getElementById("leftMenu").style.display = "none";
}

function openRightMenu() {
  document.getElementById("rightMenu").style.display = "block";
}

function closeRightMenu() {
  document.getElementById("rightMenu").style.display = "none";
}
</script>
     
</body>
</html>

报个问题: