JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/dot-luv/jquery-ui.css">
<ul id='TopLevel-List'>

   <li><a href=# id='trigger_Nested-0'>Top Level 1</a>

   <ul id='Nested-0' >
      <li><a href=#>Item 1</li>
      <li><a href=#>Item 2</li>
   </ul>
   </li>

   <li><a href=# id='trigger_Nested-1'>Top Level 2</a>

   <ul id='Nested-1'>
      <li><a href=#>Item 3</a></li>
      <li><a href=#>Item 4</a></li>
      <li><a href=#>Item 5</a></li>
   </ul>
   </li>

</ul>

JavaScript

$(function(){
  $("ul[id|=Nested]").hide();

  $("a[id|=trigger_Nested]").click(function() {
    $(this).siblings("ul").slideToggle("fast");
    return false;
  });
});