JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="nav"><li class="li_item"><a class="navlink" href="http://www.demon-slayer.org/contact-us/"><strong>Contact Us</strong><span>We are here to help.</span></a></li></ul>

JavaScript

$(document).ready(function() { 
    $("#nav li span:contains('We are here to help')") 
      .css("color", "#123456");  
});