, so if you are in shiny module,
use <code>ns()</code> for ID on UI but <strong>DO NOT</strong> add the <code>ns()</code> wrapper on server.</p>
<p>UI</p>
<p></p><div class="sourceCode"><pre><code><span id="cb1-1"><a href="#cb1-1"></a><span class="kw">actionButton</span>(<span class="dt">inputId =</span> <span class="kw">ns</span>(<span class="st">"btn"</span>))</span></code></pre><p></p></div>
<p>server</p>
<p></p><div class="sourceCode"><pre><code><span id="cb1-1"><a href="#cb1-1"></a>addLoader<span class