这是一个更好的答案

我能够将Superfish的相同HTML转换为响应式抽屉菜单。JS非常简单，整个过程基本上都是使用CSS完成的。检查一下，让我知道你们的想法！

// TRIGGER ACTIVE STATE
$('#mobnav-btn').click(

  function() {
    $('.sf-menu').toggleClass("xactive");
  });



// TRIGGER DROP DOWN SUBS
$('.mobnav-subarrow').click(

  function() {
    $(this).parent().toggleClass("xpopdrop");
  });

body {
  font-family: Arial;
  font-size: 12px;
  padding: 20px;
}
#mobnav-btn {
  display: none;
  font-size: 20px;
  font-weight: bold;
  background-color: blue;
  color: white;
  padding: 10px;
  cursor: pointer;
}
.mobnav-subarrow {
  display: none;
}
@media only screen and (max-width: 480px) {
  #mobnav-btn {
    display: block;
  }
  .mobnav-subarrow {
    display: block;
    background-color: #0f3975;
    opacity: .3;
    border-bottom: 1px solid white;
    border-top: 1px solid black;
    height: 20px;
    width: 30px;
    background-position: top left!important;
    position: absolute;
    top: 8px;
    right: 10px;
    -webkit-border-radius: 5px;
    border-radius: 5px;
    cursor: pointer;
    -webkit-border-radius: 5px;
    border-radius: 5px;
    cursor: pointer;
    -webkit-transition: all .1s ease-in-out;
    -moz-transition: all .1s ease-in-out;
    -ms-transition: all .1s ease-in-out;
    -o-transition: all .1s ease-in-out;
    transition: all .1s ease-in-out;
  }
  .sf-menu {
    width: 100%!important;
    display: none;
  }
  .sf-menu.xactive {
    display: block!important;
  }
  .sf-menu li {
    float: none!important;
    display: block!important;
    width: 100%!important;
  }
  .sf-menu li a {
    float: none!important;
  }
  .sf-menu ul {
    position: static!important;
    display: none!important;
  }
  .xpopdrop ul {
    display: block!important;
  }
}

<script src="http://code.jquery.com/jquery-compat-git.js"></script>
<script src="http://users.tpg.com.au/j_birch/plugins/superfish/js/superfish.js"></script>
<link href="http://users.tpg.com.au/j_birch/plugins/superfish/css/superfish.css" rel="stylesheet" />
<small>This is a responsive Superfish Menu by <a href="mailto:ryanbrackett@gmail.com">Ryan Brackett</a>. <br/>
    <br/>In this demo, you can drag the middle bar to see the responsive menu. I have already included the default css and js files for Superfish</small>

<br/>
<br/>
<div id="mobnav-btn">Button</div>
<ul class="sf-menu">
  <li><a href="#">Item 1</a>

    <div class="mobnav-subarrow"></div>
    <ul>
      <li><a href="#">Subitem 1.1</a>

      </li>
      <li><a href="#">Subitem 1.2</a>

      </li>
      <li><a href="#">Subitem 1.3</a>

      </li>
      <li><a href="#">Subitem 1.4</a>

      </li>
    </ul>
  </li>
  <li><a href="#">Item 2</a>

    <div class="mobnav-subarrow"></div>
    <ul>
      <li><a href="#">Subitem 2.1</a>

      </li>
      <li><a href="#">Subitem 2.2</a>

      </li>
      <li><a href="#">Subitem 2.3</a>

      </li>
      <li><a href="#">Subitem 2.4</a>

      </li>
    </ul>
  </li>
  <li><a href="#">Item 3</a>

    <div class="mobnav-subarrow"></div>
    <ul>
      <li><a href="#">Subitem 3.1</a>

      </li>
      <li><a href="#">Subitem 3.2</a>

      </li>
      <li><a href="#">Subitem 3.3</a>

      </li>
      <li><a href="#">Subitem 3.4</a>

      </li>
    </ul>
  </li>
  <li><a href="#">Item 4</a>

    <div class="mobnav-subarrow"></div>
    <ul>
      <li><a href="#">Subitem 4.1</a>

      </li>
      <li><a href="#">Subitem 4.2</a>

      </li>
      <li><a href="#">Subitem 4.3</a>

      </li>
      <li><a href="#">Subitem 4.4</a>

      </li>
    </ul>
  </li>
  <li><a href="#">Item 5</a>

    <div class="mobnav-subarrow"></div>
    <ul>
      <li><a href="#">Subitem 5.1</a>

      </li>
      <li><a href="#">Subitem 5.2</a>

      </li>
      <li><a href="#">Subitem 5.3</a>

      </li>
      <li><a href="#">Subitem 5.4</a>

      </li>
    </ul>
  </li>
  <li><a href="#">Item 6</a>

    <div class="mobnav-subarrow"></div>
    <ul>
      <li><a href="#">Subitem 6.1</a>

      </li>
      <li><a href="#">Subitem 6.2</a>

      </li>
      <li><a href="#">Subitem 6.3</a>

      </li>
      <li><a href="#">Subitem 6.4</a>

      </li>
    </ul>
  </li>
</ul>