ss="r-in"><span>ui <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/pkg/shiny/man/fluidPage.html" class="external-link">fluidPage</a></span><span class="op">(</span></span></span>
<span class="r-in"><span>  <span class="fu">introjsUI</span><span class="op">(</span><span class="op">)</span>, <span class="co"># must include in UI</span></span></span>
<span class="r-in"><span>  <span class="fu"><a href="https://rdrr.io/pkg/shiny/man/actionButton.html" class="external-link">actionButton</a></