how to render div on all free space in browser
<p>Just for experiment I tried simple html ccs snnipet.</p>

<p>Here is fiddle <a href="https://jsfiddle.net/u768afb3/" rel="nofollow">https://jsfiddle.net/u768afb3/</a></p>

<p>But it don't fill space. What need I do?</p>

<p><strong>CSS</strong></p>

<pre><code>html body
{
     heigth:100%;
     width: 100%;
     margin: 0;
     padding: 0;
}

div.layout{
    border: 1px greay solid;
    heigth:100%;
    width: 100%;
}
</code></pre>

<p><strong>HTML</strong></p>

<pre><code>&lt;div class="layout"&gt;&lt;/div&gt;
</code></pre>