Merge pull request #17353 from dmbaughman/v4-navbar-example

v4 - Updated default navbar example to use responsive navbar

diff --cc docs/examples/navbar/index.html
index 2871ef8365721d6a9b80c7f679130b0b06483453,78461da283bbcd3eed1385852abefeadbfe84acc..51328c795384e5c7dde373405681ae37da87c919
--- 1/docs/examples/navbar/index.html
--- 2/docs/examples/navbar/index.html
+++ b/docs/examples/navbar/index.html
@@@ -40,9 -54,10 +54,10 @@@
        <!-- Main component for a primary marketing message or call to action -->
        <div class="jumbotron">
          <h1>Navbar example</h1>
-         <p>This example is a quick exercise to illustrate how the default navbar works. It's placed within a <code>.container</code> to limit its width and will scroll with the rest of the page's content.</p>
+         <p>This example is a quick exercise to illustrate how the default responsive navbar works. It's placed within a <code>.container</code> to limit its width and will scroll with the rest of the page's content.</p>
+         <p>At the smallest breakpoint, the collapse plugin is used to hide the links and show a menu button to toggle the collapsed content.</p>
          <p>
 -          <a class="btn btn-lg btn-primary" href="../../components/#navbar" role="button">View navbar docs &raquo;</a>
 +          <a class="btn btn-lg btn-primary" href="../../components/navbar" role="button">View navbar docs &raquo;</a>
          </p>
        </div>