What is the difference between * and *|* in CSS?
<p>In CSS, <code>*</code> will match any element.</p>

<p>Frequently, <code>*|*</code> is used instead of <code>*</code> to match all elements. This is generally used for testing purposes.</p>

<p>What is the difference between <code>*</code> and <code>*|*</code> in CSS?</p>