 and complex selectors. If jQuery is already installed on your site (and chances are, if you're using either <a href="https://wordpress.org/">WordPress</a> or <a href="http://getbootstrap.com/">Bootstrap</a>, it already is), then you're doing yourself a disservice by not knowing where it can save you time and add some backwards compatibility when you must support older browsers.</p>
<h2 id="!jquery">!jQuery <a class="direct-link" href="#!jquery"> </a></h2>
<p>On the flipside, you need to learn when jQuery i