DOM Enlightenment Book
by peroli
HTML
<script src="https://getfirebug.com/firebug-lite-debug.js"></script>
<ul>
<li>Hello</li>
<li>world</li>
</ul>JavaScript
console.log(document.querySelector('li').matches('li:first-child')); //logs truePlease Whitelist JSFiddle in your content blocker.
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