JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="list_a"><span class="closeButton">X</span>
  <li value="1">Red&nbsp;&nbsp;<span class="closeButton">X</span></li>
  <li value="2">Orange&nbsp;&nbsp;<span class="closeButton">X</span></li>
  <li value="3">Green&nbsp;&nbsp;<span class="closeButton">X</span></li>
</ul>

CSS

li {
  cursor: pointer;   
}

JavaScript

// Use live to bind click event to each li and remove it
$('.closeButton').live('click', function(){
    $(this).parent().remove();
});