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<div class="col-md-9 contents">
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<div class="page-header">
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<h1>Reactive Log Visualizer</h1>
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<small class="dont-index">Source: <a href="https://github.com/rstudio/shiny/blob/HEAD/R/graph.R" class="external-link"><code>R/graph.R</code></a></small>
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<div class="hidden name"><code>reactlog.Rd</code></div>
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</div>
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<div class="ref-description">
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<p>Provides an interactive browser-based tool for visualizing reactive
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dependencies and execution in your application.</p>
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</div>
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<div id="ref-usage">
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<div class="sourceCode"><pre class="sourceCode r"><code><span class="fu">reactlog</span><span class="op">(</span><span class="op">)</span>
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<span class="fu">reactlogShow</span><span class="op">(</span>time <span class="op">=</span> <span class="cn">TRUE</span><span class="op">)</span>
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<span class="fu">reactlogReset</span><span class="op">(</span><span class="op">)</span></code></pre></div>
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</div>
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<div id="arguments">
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<h2>Arguments</h2>
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<dl><dt>time</dt>
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<dd><p>A boolean that specifies whether or not to display the
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time that each reactive takes to calculate a result.</p></dd>
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</dl></div>
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<div id="details">
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<h2>Details</h2>
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<p>To use the reactive log visualizer, start with a fresh R session and
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run the command <code>options(shiny.reactlog=TRUE)</code>; then launch your
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application in the usual way (e.g. using <code><a href="runApp.html">runApp()</a></code>). At
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any time you can hit Ctrl+F3 (or for Mac users, Command+F3) in your
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web browser to launch the reactive log visualization.</p>
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<p>The reactive log visualization only includes reactive activity up
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until the time the report was loaded. If you want to see more recent
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activity, refresh the browser.</p>
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<p>Note that Shiny does not distinguish between reactive dependencies
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that "belong" to one Shiny user session versus another, so the
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visualization will include all reactive activity that has taken place
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in the process, not just for a particular application or session.</p>
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<p>As an alternative to pressing Ctrl/Command+F3--for example, if you
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are using reactives outside of the context of a Shiny
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application--you can run the <code>reactlogShow</code> function, which will
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generate the reactive log visualization as a static HTML file and
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launch it in your default browser. In this case, refreshing your
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browser will not load new activity into the report; you will need to
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call <code>reactlogShow()</code> explicitly.</p>
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<p>For security and performance reasons, do not enable
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<code>shiny.reactlog</code> in production environments. When the option is
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enabled, it's possible for any user of your app to see at least some
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of the source code of your reactive expressions and observers.</p>
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</div>
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<div id="functions">
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<h2>Functions</h2>
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<ul><li><p><code>reactlog</code>: Return a list of reactive information. Can be used in conjunction with
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<a href="https://rstudio.github.io/reactlog//reference/reactlog_show.html" class="external-link">reactlog::reactlog_show</a> to later display the reactlog graph.</p></li>
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<li><p><code>reactlogShow</code>: Display a full reactlog graph for all sessions.</p></li>
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<li><p><code>reactlogReset</code>: Resets the entire reactlog stack. Useful for debugging and removing all prior reactive history.</p></li>
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</ul></div>
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<nav id="toc" data-toggle="toc" class="sticky-top"><h2 data-toc-skip>Contents</h2>
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<p></p><p>Developed by Winston Chang, Joe Cheng, JJ Allaire, Carson Sievert, Barret Schloerke, Yihui Xie, Jeff Allen, Jonathan McPherson, Alan Dipert, Barbara Borges.</p>
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<p></p><p>Site built with <a href="https://pkgdown.r-lib.org/" class="external-link">pkgdown</a> 2.0.2.</p>
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