onsiveness</a>
</li>
<li>
  <a href="#migration">Migrating from 2.x to 3.0</a>
</li>
<li>
  <a href="#support">Browser and device support</a>
  <ul class="nav">
    <li><a href="#support-browsers">Supported browsers</a></li>
    <li><a href="#support-ie8-ie9">Internet Explorer 8-9</a></li>
    <li><a href="#support-ie8-respondjs">IE8 and Respond.js</a></li>
    <li><a href="#support-ie8-box-sizing">IE8 and box-sizing</a></li>
    <li><a href="#support-ie8-font-face">IE8 and @font-face</a></li>
    <li><a hr