JSFiddle - React, Tailwind, and code Playground

HTML

<head>    
<link href="textContainer.css" rel="stylesheet" type="text/css" />
<script type="text/javascript"     src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
</head>



<body>
<div id="menu_about">
<a class="link" href="#about" data-link="first">
    &nbsp;&nbsp; Why We Exist
</a> &#8226; 
<a class="link" href="#about" data-link="second">Who We Are</a> &#8226;
<a class="link" href="#about" data-link="third">What We Do</a> &#8226; 
<a class="link" href="#about" data-link="fourth">How We Think</a> &#8226; 
<a class="link" href="#about" data-link="fifth">Where We Are Going</a>
</div>
<div id="pages_about" class="textContainer_about">
<div class="textWord_about" data-link="first">
 <p>ffffffffffffffffffffffffffff</p>
 </div>
<div class="textWord_about" data-link="second">
  <p>ffffffffffffffffffffffffffff</p>
</div>
<div class="textWord_about" data-link="third">
  <p>ffffffffffffffffffffffffffff</p>
</div>
<div class="textWord_about" data-link="fourth">
  <p>ffffffffffffffffffffffffffff</p>
  <p>ffffffffffffffffffffffffffff</p>
  <p>ffffffffffffffffffffffffffff</p>
  <p>ffffffffffffffffffffffffffff</p>
  <p>ffffffffffffffffffffffffffff</p>
</div>
<div class="textWord_about" data-link="fifth">
  <p>ffffffffffffffffffffffffffff</p>
</div>
</div>


<script type="text/javascript">
$('.textWord_about').hide();

$('.link').click(function() {
    $('.textWord_about').hide();       
    $('.textWord_about[data-link=' + $(this).data('link') + ']').fadeIn({
        width: '200px'
    }, 300);
});
</script>