How Can I Style an Element Based on Both Its ID and Class in CSS?

Combining Class and ID in CSS Selectors

You may encounter situations where you need to style elements based on both their class and ID attributes. While it's easy to use one attribute at a time, combining them can seem confusing.

Let's consider the following HTML code:

<div class="sectionA">
<p><strong>Is it possible to define a style that applies specifically to "a div with></strong></p>
<p>There are two ways to achieve this:</p>
<ol><li>
<strong>Use a combined ID and class selector:</strong> In your stylesheet, write the following:</li></ol>
<pre class="brush:php;toolbar:false">div#content.myClass

This syntax means that the rule will apply to

elements that have both the ID attribute value "content" and the class attribute value "myClass".

2. Create a class name that combines both identifiers: Instead of using separate class and ID attributes, you can create a single class name that represents the desired combination. For example, you could use:

<div class="content-sectionA">
<p>This approach combines the functionality of both the ID and the class attributes into a single identifier.</p>
<p><strong>Note:</strong></p>
<ul>
<li>You can chain multiple class names or ID selectors to specify more specific combinations.</li>
<li>In modern browsers, the use of the tag name in selectors is not necessary for performance reasons. However, it is recommended to use it sparingly.</li>
</ul>
</div>