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shiny/reference/downloadButton.html
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<!-- 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>Create a download button or link — downloadButton • 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="Create a download button or link — downloadButton"><meta property="og:description" content="Use these functions to create a download button or link; when clicked, it
will initiate a browser download. The filename and contents are specified by
the corresponding downloadHandler() defined in the server
function."><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]>
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<h1>Create a download button or link</h1>
<small class="dont-index">Source: <a href="https://github.com/rstudio/shiny/blob/main/R/bootstrap.R" class="external-link"><code>R/bootstrap.R</code></a></small>
<div class="hidden name"><code>downloadButton.Rd</code></div>
</div>
<div class="ref-description">
<p>Use these functions to create a download button or link; when clicked, it
will initiate a browser download. The filename and contents are specified by
the corresponding <code><a href="downloadHandler.html">downloadHandler()</a></code> defined in the server
function.</p>
</div>
<div id="ref-usage">
<div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">downloadButton</span><span class="op">(</span></span>
<span> <span class="va">outputId</span>,</span>
<span> label <span class="op">=</span> <span class="st">"Download"</span>,</span>
<span> class <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span> <span class="va">...</span>,</span>
<span> icon <span class="op">=</span> <span class="fu">shiny</span><span class="fu">::</span><span class="fu"><a href="icon.html">icon</a></span><span class="op">(</span><span class="st">"download"</span><span class="op">)</span></span>
<span><span class="op">)</span></span>
<span></span>
<span><span class="fu">downloadLink</span><span class="op">(</span><span class="va">outputId</span>, label <span class="op">=</span> <span class="st">"Download"</span>, class <span class="op">=</span> <span class="cn">NULL</span>, <span class="va">...</span><span class="op">)</span></span></code></pre></div>
</div>
<div id="arguments">
<h2>Arguments</h2>
<dl><dt id="arg-outputid">outputId<a class="anchor" aria-label="anchor" href="#arg-outputid"></a></dt>
<dd><p>The name of the output slot that the <code>downloadHandler</code>
is assigned to.</p></dd>
<dt id="arg-label">label<a class="anchor" aria-label="anchor" href="#arg-label"></a></dt>
<dd><p>The label that should appear on the button.</p></dd>
<dt id="arg-class">class<a class="anchor" aria-label="anchor" href="#arg-class"></a></dt>
<dd><p>Additional CSS classes to apply to the tag, if any.</p></dd>
<dt id="arg--">...<a class="anchor" aria-label="anchor" href="#arg--"></a></dt>
<dd><p>Other arguments to pass to the container tag function.</p></dd>
<dt id="arg-icon">icon<a class="anchor" aria-label="anchor" href="#arg-icon"></a></dt>
<dd><p>An <code><a href="icon.html">icon()</a></code> to appear on the button. Default is <code>icon("download")</code>.</p></dd>
</dl></div>
<div id="see-also">
<h2>See also</h2>
<div class="dont-index"><p><code><a href="downloadHandler.html">downloadHandler()</a></code></p></div>
</div>
<div id="ref-examples">
<h2>Examples</h2>
<div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="kw">if</span> <span class="op">(</span><span class="cn">FALSE</span><span class="op">)</span> <span class="op">{</span> <span class="co"># \dontrun{</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="https://rstudio.github.io/htmltools/reference/builder.html" class="external-link">p</a></span><span class="op">(</span><span class="st">"Choose a dataset to download."</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">"dataset"</span>, <span class="st">"Dataset"</span>, choices <span class="op">=</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">"mtcars"</span>, <span class="st">"airquality"</span><span class="op">)</span><span class="op">)</span>,</span></span>
<span class="r-in"><span> <span class="fu">downloadButton</span><span class="op">(</span><span class="st">"downloadData"</span>, <span class="st">"Download"</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="co"># The requested dataset</span></span></span>
<span class="r-in"><span> <span class="va">data</span> <span class="op">&lt;-</span> <span class="fu"><a href="reactive.html">reactive</a></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/base/get.html" class="external-link">get</a></span><span class="op">(</span><span class="va">input</span><span class="op">$</span><span class="va">dataset</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">}</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span> <span class="va">output</span><span class="op">$</span><span class="va">downloadData</span> <span class="op">&lt;-</span> <span class="fu"><a href="downloadHandler.html">downloadHandler</a></span><span class="op">(</span></span></span>
<span class="r-in"><span> filename <span class="op">=</span> <span class="kw">function</span><span class="op">(</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span> <span class="co"># Use the selected dataset as the suggested file name</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/base/paste.html" class="external-link">paste0</a></span><span class="op">(</span><span class="va">input</span><span class="op">$</span><span class="va">dataset</span>, <span class="st">".csv"</span><span class="op">)</span></span></span>
<span class="r-in"><span> <span class="op">}</span>,</span></span>
<span class="r-in"><span> content <span class="op">=</span> <span class="kw">function</span><span class="op">(</span><span class="va">file</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span> <span class="co"># Write the dataset to the `file` that will be downloaded</span></span></span>
<span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/utils/write.table.html" class="external-link">write.csv</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/utils/data.html" class="external-link">data</a></span><span class="op">(</span><span class="op">)</span>, <span class="va">file</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></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 class="co"># }</span></span></span>
<span class="r-in"><span></span></span>
</code></pre></div>
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