try_w3examples_344 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html>
<html>
<title>编程狮(w3cschool.cn)</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://7npmedia.w3cschool.cn/w3.css">
<body>
    <div class="w3-container">
      <h2>过滤器拉下点击</h2>
      <p>单击下拉列表并搜索输入字段内的特定链接.</p>
    
      <div class="w3-dropdown-click">
        <button class="w3-button w3-black" onclick="dropFunction()">下拉列表</button>
        <div class="w3-dropdown-content w3-bar-block w3-card w3-light-grey" id="myDIV">
          <input class="w3-input w3-padding" type="text" placeholder="搜索.." id="myInput" onkeyup="filterFunction()">
          <a class="w3-bar-item w3-button" href="#about">关于</a>
          <a class="w3-bar-item w3-button" href="#base">基地</a>
          <a class="w3-bar-item w3-button" href="#blog">博客</a>
          <a class="w3-bar-item w3-button" href="#contact">联系</a>
          <a class="w3-bar-item w3-button" href="#custom">自定义</a>
          <a class="w3-bar-item w3-button" href="#support">支持</a>
          <a class="w3-bar-item w3-button" href="#tools">工具</a>
        </div>
      </div>
    </div>
<script>
// Dropdown
function dropFunction() {
  var x = document.getElementById("myDIV");
  if (x.className.indexOf("w3-show") == -1) {
    x.className += " w3-show";
  } else {
    x.className = x.className.replace(" w3-show", "");
  }
}
 
 
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运行结果
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