or</code> and <code>attributes</code> parameters, the value in <code>attributes</code> is used.</p>
<p>For developer convenience, Mithril makes an exception for the <code>class</code> attribute: if there are classes defined in both parameters, they are concatenated as a space separated list. It does not, however, de-dupe classes if the same class is declared twice.</p>
<p><em>Examples:</em></p>
<p><code>&quot;div&quot;</code></p>
<p><code>&quot;#container&quot;</code></p>
<p><code>&quot;.active&quot;</code>