github/shiny
1
1
Fork 0
mirror of https://github.com/rstudio/shiny.git synced 2026-01-10 15:38:19 -05:00
Code Issues Packages Projects Releases Wiki Activity
Files
afebf8a5c3fe937ceed409256fcacdfa8d39fcf2
shiny/reference/conditionalPanel.html
schloerke afebf8a5c3 Built site for shiny@1.12.1: e719d8a
2025-12-09 21:32:58 +00:00

172 lines
15 KiB
HTML
Raw Blame History

<!DOCTYPE html>
<!-- Generated by pkgdown: do not edit by hand --><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Conditional Panel — conditionalPanel • shiny</title><!-- jquery --><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js" integrity="sha512-v2CJ7UaYy4JwqLDIrZUI/4hqeoQieOmAZNXBeQyjo21dadnwR+8ZaIJVT8EE2iyI61OV8e6M8PP2/4hpQINQ/g==" crossorigin="anonymous" referrerpolicy="no-referrer"></script><!-- Bootstrap --><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous"><script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script><!-- bootstrap-toc --><link rel="stylesheet" href="../bootstrap-toc.css"><script src="../bootstrap-toc.js"></script><!-- Font Awesome icons --><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/all.min.css" integrity="sha256-mmgLkCYLUQbXn0B1SRqzHar6dCnv9oZFPEC1g1cwlkk=" crossorigin="anonymous"><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/v4-shims.min.css" integrity="sha256-wZjR52fzng1pJHwx4aV2AO3yyTOXrcDW7jBpJtTwVxw=" crossorigin="anonymous"><!-- clipboard.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.6/clipboard.min.js" integrity="sha256-inc5kl9MA1hkeYUt+EC3BhlIgyp/2jDIyBLS6k3UxPI=" crossorigin="anonymous"></script><!-- headroom.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/headroom.min.js" integrity="sha256-AsUX4SJE1+yuDu5+mAVzJbuYNPHj/WroHuZ8Ir/CkE0=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/jQuery.headroom.min.js" integrity="sha256-ZX/yNShbjqsohH1k95liqY9Gd8uOiE1S4vZc+9KQ1K4=" crossorigin="anonymous"></script><!-- pkgdown --><link href="../pkgdown.css" rel="stylesheet"><script src="../pkgdown.js"></script><meta property="og:title" content="Conditional Panel — conditionalPanel"><meta property="og:description" content="Creates a panel that is visible or not, depending on the value of a
JavaScript expression. The JS expression is evaluated once at startup and
whenever Shiny detects a relevant change in input/output."><meta property="og:image" content="/logo.png"><!-- mathjax --><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script><!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]--></head><body data-spy="scroll" data-target="#toc">
<div class="container template-reference-topic">
<header><div class="navbar navbar-default navbar-fixed-top" role="navigation">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<span class="navbar-brand">
<a class="navbar-link" href="../index.html">shiny</a>
<span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="">1.12.1</span>
</span>
</div>
<div id="navbar" class="navbar-collapse collapse">
<ul class="nav navbar-nav"><li>
<a href="../reference/index.html">Reference</a>
</li>
<li>
<a href="../news/index.html">Changelog</a>
</li>
</ul><ul class="nav navbar-nav navbar-right"><li>
<a href="https://github.com/rstudio/shiny/" class="external-link">
<span class="fab fa-github fa-lg"></span>
</a>
</li>
</ul></div><!--/.nav-collapse -->
</div><!--/.container -->
</div><!--/.navbar -->
</header><div class="row">
<div class="col-md-9 contents">
<div class="page-header">
<h1>Conditional Panel</h1>
<small class="dont-index">Source: <a href="https://github.com/rstudio/shiny/blob/rc-v1.12.1/R/bootstrap.R" class="external-link"><code>R/bootstrap.R</code></a></small>
<div class="hidden name"><code>conditionalPanel.Rd</code></div>
</div>
<div class="ref-description">
<p>Creates a panel that is visible or not, depending on the value of a
JavaScript expression. The JS expression is evaluated once at startup and
whenever Shiny detects a relevant change in input/output.</p>
</div>
<div id="ref-usage">
<div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">conditionalPanel</span><span class="op">(</span><span class="va">condition</span>, <span class="va">...</span>, ns <span class="op">=</span> <span class="fu"><a href="NS.html">NS</a></span><span class="op">(</span><span class="cn">NULL</span><span class="op">)</span><span class="op">)</span></span></code></pre></div>
</div>
<div id="arguments">
<h2>Arguments</h2>
<dl><dt id="arg-condition">condition<a class="anchor" aria-label="anchor" href="#arg-condition"></a></dt>
<dd><p>A JavaScript expression that will be evaluated repeatedly to
determine whether the panel should be displayed.</p></dd>
<dt id="arg--">...<a class="anchor" aria-label="anchor" href="#arg--"></a></dt>
<dd><p>Elements to include in the panel.</p></dd>
<dt id="arg-ns">ns<a class="anchor" aria-label="anchor" href="#arg-ns"></a></dt>
<dd><p>The <code><a href="NS.html">namespace()</a></code> object of the current module, if
any.</p></dd>
</dl></div>
<div id="details">
<h2>Details</h2>
<p>In the JS expression, you can refer to <code>input</code> and <code>output</code>
JavaScript objects that contain the current values of input and output. For
example, if you have an input with an id of <code>foo</code>, then you can use
<code>input.foo</code> to read its value. (Be sure not to modify the input/output
objects, as this may cause unpredictable behavior.)</p>
</div>
<div id="note">
<h2>Note</h2>
<p>You are not recommended to use special JavaScript characters such as a
period <code>.</code> in the input id's, but if you do use them anyway, for
example, <code>inputId = "foo.bar"</code>, you will have to use
<code>input["foo.bar"]</code> instead of <code>input.foo.bar</code> to read the input
value.</p>
</div>
<div id="ref-examples">
<h2>Examples</h2>
<div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="co">## Only run this example in interactive R sessions</span></span></span>
<span class="r-in"><span><span class="kw">if</span> <span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/interactive.html" class="external-link">interactive</a></span><span class="op">(</span><span class="op">)</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span> <span class="va">ui</span> <span class="op">&lt;-</span> <span class="fu"><a href="fluidPage.html">fluidPage</a></span><span class="op">(</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="sidebarLayout.html">sidebarPanel</a></span><span class="op">(</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="selectInput.html">selectInput</a></span><span class="op">(</span><span class="st">"plotType"</span>, <span class="st">"Plot Type"</span>,</span></span>
<span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span>Scatter <span class="op">=</span> <span class="st">"scatter"</span>, Histogram <span class="op">=</span> <span class="st">"hist"</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">)</span>,</span></span>
<span class="r-in"><span> <span class="co"># Only show this panel if the plot type is a histogram</span></span></span>
<span class="r-in"><span> <span class="fu">conditionalPanel</span><span class="op">(</span></span></span>
<span class="r-in"><span> condition <span class="op">=</span> <span class="st">"input.plotType == 'hist'"</span>,</span></span>
<span class="r-in"><span> <span class="fu"><a href="selectInput.html">selectInput</a></span><span class="op">(</span></span></span>
<span class="r-in"><span> <span class="st">"breaks"</span>, <span class="st">"Breaks"</span>,</span></span>
<span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"Sturges"</span>, <span class="st">"Scott"</span>, <span class="st">"Freedman-Diaconis"</span>, <span class="st">"[Custom]"</span> <span class="op">=</span> <span class="st">"custom"</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">)</span>,</span></span>
<span class="r-in"><span> <span class="co"># Only show this panel if Custom is selected</span></span></span>
<span class="r-in"><span> <span class="fu">conditionalPanel</span><span class="op">(</span></span></span>
<span class="r-in"><span> condition <span class="op">=</span> <span class="st">"input.breaks == 'custom'"</span>,</span></span>
<span class="r-in"><span> <span class="fu"><a href="sliderInput.html">sliderInput</a></span><span class="op">(</span><span class="st">"breakCount"</span>, <span class="st">"Break Count"</span>, min <span class="op">=</span> <span class="fl">1</span>, max <span class="op">=</span> <span class="fl">50</span>, value <span class="op">=</span> <span class="fl">10</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">)</span>,</span></span>
<span class="r-in"><span> <span class="fu"><a href="sidebarLayout.html">mainPanel</a></span><span class="op">(</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="plotOutput.html">plotOutput</a></span><span class="op">(</span><span class="st">"plot"</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span> <span class="va">server</span> <span class="op">&lt;-</span> <span class="kw">function</span><span class="op">(</span><span class="va">input</span>, <span class="va">output</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span> <span class="va">x</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/stats/Normal.html" class="external-link">rnorm</a></span><span class="op">(</span><span class="fl">100</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="va">y</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/stats/Normal.html" class="external-link">rnorm</a></span><span class="op">(</span><span class="fl">100</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span> <span class="va">output</span><span class="op">$</span><span class="va">plot</span> <span class="op">&lt;-</span> <span class="fu"><a href="renderPlot.html">renderPlot</a></span><span class="op">(</span><span class="op">{</span></span></span>
<span class="r-in"><span> <span class="kw">if</span> <span class="op">(</span><span class="va">input</span><span class="op">$</span><span class="va">plotType</span> <span class="op">==</span> <span class="st">"scatter"</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><span class="op">(</span><span class="va">x</span>, <span class="va">y</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">}</span> <span class="kw">else</span> <span class="op">{</span></span></span>
<span class="r-in"><span> <span class="va">breaks</span> <span class="op">&lt;-</span> <span class="va">input</span><span class="op">$</span><span class="va">breaks</span></span></span>
<span class="r-in"><span> <span class="kw">if</span> <span class="op">(</span><span class="va">breaks</span> <span class="op">==</span> <span class="st">"custom"</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span> <span class="va">breaks</span> <span class="op">&lt;-</span> <span class="va">input</span><span class="op">$</span><span class="va">breakCount</span></span></span>
<span class="r-in"><span> <span class="op">}</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/graphics/hist.html" class="external-link">hist</a></span><span class="op">(</span><span class="va">x</span>, breaks <span class="op">=</span> <span class="va">breaks</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">}</span></span></span>
<span class="r-in"><span> <span class="op">}</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">}</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span> <span class="fu"><a href="shinyApp.html">shinyApp</a></span><span class="op">(</span><span class="va">ui</span>, <span class="va">server</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="op">}</span></span></span>
</code></pre></div>
</div>
</div>
<div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar">
<nav id="toc" data-toggle="toc" class="sticky-top"><h2 data-toc-skip>Contents</h2>
</nav></div>
</div>
<footer><div class="copyright">
<p></p><p>Developed by Winston Chang, Joe Cheng, JJ Allaire, Carson Sievert, Barret Schloerke, Garrick Aden-Buie, Yihui Xie, Jeff Allen, Jonathan McPherson, Alan Dipert, Barbara Borges, Posit Software, PBC.</p>
</div>
<div class="pkgdown">
<p></p><p>Site built with <a href="https://pkgdown.r-lib.org/" class="external-link">pkgdown</a> 2.2.0.</p>
</div>
</footer></div>
</body></html>
Reference in New Issue View Git Blame Copy Permalink