test/bar.html


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<!DOCTYPE html>
<html>

<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
  <style>
    body {
      margin: 0;
      font-family: Arial, Helvetica, sans-serif;
    }

    .topnav {
      overflow: hidden;
      background-color: #333;
    }

    .topnav a {
      float: left;
      display: block;
      color: #f2f2f2;
      text-align: center;
      padding: 14px 16px;
      text-decoration: none;
      font-size: 17px;
    }

    .topnav a:hover {
      background-color: #ddd;
      color: black;
    }

    .topnav a.active {
      background-color: #4CAF50;
      color: white;
    }

    .topnav .icon {
      display: none;
    }

    @media screen and (max-width: 600px) {
      .topnav a:not(:first-child) {
        display: none;
      }

      .topnav a.icon {
        float: right;
        display: block;
      }
    }

    @media screen and (max-width: 600px) {
      .topnav.responsive {
        position: relative;
      }

      .topnav.responsive .icon {
        position: absolute;
        right: 0;
        top: 0;
      }

      .topnav.responsive a {
        float: none;
        display: block;
        text-align: left;
      }
    }
  </style>
</head>

<body>

  <div class="topnav" id="myTopnav">
    <a href="#home" class="active">Home</a>
    <a href="#news">News</a>
    <a href="#contact">Contact</a>
    <a href="#about">About</a>
    <a href="javascript:void(0);" class="icon" onclick="myFunction()">
      <i class="fa fa-bars"></i>
    </a>
  </div>

  <div style="padding-left:16px">
    <h2>Responsive Topnav Example</h2>
    <p>Resize the browser window to see how it works.</p>
  </div>

  <script>
    function myFunction() {
      var x = document.getElementById("myTopnav");
      if (x.className === "topnav") {
        x.className += " responsive";
      } else {
        x.className = "topnav";
      }
    }
  </script>

</body>

</html>