title: Polymer 1.0: How do I get this <paper-menu-button> example to work properly?
body: <p>How does one make the <code>&lt;paper-menu-button&gt;</code> dropdown work properly? <a href="http://jsbin.com/xamixicuna/4/edit?html,output" rel="nofollow noreferrer">Here is a jsBin</a>.</p>
  
  <a href="http://jsbin.com/xamixicuna/4/edit?html,output" rel="nofollow noreferrer">http://jsbin.com/xamixicuna/4/edit?html,output</a>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
    &lt;meta charset="utf-8"&gt;
    &lt;base href="http://polygit.org/polymer:+v1.1.0/components/"&gt;
    &lt;title&gt;JS Bin&lt;/title&gt;
    &lt;link rel="import" href="polymer/polymer.html"&gt;
    &lt;link rel="import" href="iron-icons/iron-icons.html"&gt;
    &lt;link rel="import" href="paper-menu-button/paper-menu-button.html"&gt;
    &lt;link rel="import" href="paper-icon-button/paper-icon-button.html"&gt;
    &lt;link rel="import" href="paper-menu/paper-menu.html"&gt;
    &lt;link rel="import" href="paper-item/paper-item.html"&gt;
  &lt;/head&gt;  
  &lt;body&gt;
  Click the below menu icon to make the dropdown menu appear.
  &lt;br&gt;
  &lt;paper-menu-button&gt;
    &lt;paper-icon-button icon="menu" class="dropdown-trigger"&gt;&lt;/paper-icon-button&gt;
    &lt;paper-menu class="dropdown-content"&gt;
      &lt;paper-item&gt;Share&lt;/paper-item&gt;
      &lt;paper-item&gt;Settings&lt;/paper-item&gt;
      &lt;paper-item&gt;Help&lt;/paper-item&gt;
    &lt;/paper-menu&gt;
  &lt;/paper-menu-button&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>