thub.com/MithrilJS/mithril.js/pull/2214">#2214</a>)</li>
<li>cast className using toString (<a href="https://github.com/MithrilJS/mithril.js/pull/2309">#2309</a>)</li>
<li>render: call attrs&#39; hooks first, with express exception of <code>onbeforeupdate</code> to allow attrs to block components from even diffing (<a href="https://github.com/MithrilJS/mithril.js/pull/2297">#2297</a>)</li>
<li>API: <code>m.withAttr</code> removed. (<a href="https://github.com/MithrilJS/mithril.js/pull/2317">#2317</a>)</li>
