ny::parseQueryString</a></code> on the server side. For instance, if the url contains a query string like <code>https://domain/path/?foo=1</code>, we could show a notification:</p>
<div class="sourceCode" id="cb921"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span class="fu"><a href="https://rdrr.io/pkg/shiny/man/observeEvent.html">observeEvent</a></span><span class="op">(</span><span class="va">session</span><span class="op">$</span><span class="va">clientData</span><span class="op">$</s