Untitled

<head>
  <title>Test</title>
  <link rel="import"
        href="/node_modules/@polymer/paper-drawer-panel/paper-drawer-panel.html">
  <link rel="import"
        href="/node_modules/@polymer/paper-header-panel/paper-header-panel.html">
  <link rel="import"
        href="/node_modules/@polymer/paper-toolbar/paper-toolbar.html">
  <link rel="import"
        href="/node_modules/@polymer/paper-icon-button/paper-icon-button.html">
  <link rel="import"
        href="/node_modules/@polymer/iron-icons/iron-icons.html">
  <link rel="import"
        href="/node_modules/@polymer/iron-flex-layout/iron-flex-layout.html">
</head>
<body class="fullbleed vertical layout">
  <paper-drawer-panel class="flex" force-narrow="true">
    <paper-header-panel drawer>
      <div>Sidebar content...</div>
    </paper-header-panel>
    <paper-header-panel main>
      <paper-toolbar>
        <paper-icon-button icon="menu" paper-drawer-toggle></paper-icon-button>
        <div>Title</div>
      </paper-toolbar>
      <div> Main content... </div>
    </paper-header-panel>
  </paper-drawer-panel>
</body>