<div class="intro">

<p>CSS Base can be used contextually by appyling CSS Base to specific regions of the page.</p>

</div>

<div class="example newwindow">

<a href="cssbase-context-example.html" target="_blank" class="button">

View Example in New Window

</a>

</div>

<h2>Contextual Usage</h2>

<p>When CSS Base is included in a page it applies rules to all HTML elements via type selectors like this: <code>h1 {margin-bottom:1em;}</code>. An alternate version, <code>cssbase-context.css</code>, uses only descendent selectors like this: <code>.yui3-cssbase-context h1 {margin-bottom:1em;}</code>. This means you can put that class value on a node in your document to choose which region(s) of your page CSS Base will be applied to.</p>

```

<div class="yui3-cssbase">

<p>Everything within this container will have CSS Base applied.</p>

</div>

```

<h3>Note:</h3>

<p>Because CSS examples are susceptible to other CSS on the page, this example is only available in a new window at the above link.</p>