Question

How can I append a blurb of text into my first LIs’

  <ul id="topnav">
    <li class="mainNavFirst"><a href="/solutions">Solution</a>
    <li class="mainNavLast"><a href="/contact">Contact Us</a></li>
  </ul>

I want to append text inside

<li class="mainNavFirst"><a href="/solutions">Solution <span>Blurb Goes Here</span></a>

Answer 1

This is the specific use case for .append()

$('.mainNavFirst a:first-child').append('<span>Blurb Goes Here</span>');

Working Example

Specific example from jQuery Docs.