JSFiddle - React, Tailwind, and code Playground
HTML
<ul id="menu">
<li value="1" id="home" class="tab_selected"><a href="home.php">Home</a></li>
<li id="portfolio"><a href="portfolio.php">Portfolio</a></li>
<li id="music"><a href="music.php">Music</a></li>
<li id="video"><a href="video.php">Video</a></li>
<li id="photo"><a href="photo.php">Photo</a></li>
</ul>
JavaScript
if ($(this).parent().attr('value') == 1) {
$(this).css("background-color", "#4B84AF");
alert($(this).parent().attr('value'));
}