Shiny by RStudio

Conditional Panel

conditionalPanel(condition, ...)

Arguments

condition A JavaScript expression that will be evaluated repeatedly to determine whether the panel should be displayed.
... Elements to include in the panel.

Description

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.

Details

In the JS expression, you can refer to input and output JavaScript objects that contain the current values of input and output. For example, if you have an input with an id of foo, then you can use input.foo to read its value. (Be sure not to modify the input/output objects, as this may cause unpredictable behavior.)

Note

You are not recommended to use special JavaScript characters such as a period . in the input id's, but if you do use them anyway, for example, inputId = "foo.bar", you will have to use input["foo.bar"] instead of input.foo.bar to read the input value.

Examples

sidebarPanel( selectInput( "plotType", "Plot Type", c(Scatter = "scatter", Histogram = "hist")), # Only show this panel if the plot type is a histogram conditionalPanel( condition = "input.plotType == 'hist'", selectInput( "breaks", "Breaks", c("Sturges", "Scott", "Freedman-Diaconis", "[Custom]" = "custom")), # Only show this panel if Custom is selected conditionalPanel( condition = "input.breaks == 'custom'", sliderInput("breakCount", "Break Count", min=1, max=1000, value=10) ) ) )
<div class="col-sm-4"> <form class="well"> <div class="form-group shiny-input-container"> <label class="control-label" for="plotType">Plot Type</label> <div> <select id="plotType"><option value="scatter" selected>Scatter</option> <option value="hist">Histogram</option></select> <script type="application/json" data-for="plotType" data-nonempty="">{}</script> </div> </div> <div data-display-if="input.plotType == &#39;hist&#39;"> <div class="form-group shiny-input-container"> <label class="control-label" for="breaks">Breaks</label> <div> <select id="breaks"><option value="Sturges" selected>Sturges</option> <option value="Scott">Scott</option> <option value="Freedman-Diaconis">Freedman-Diaconis</option> <option value="custom">[Custom]</option></select> <script type="application/json" data-for="breaks" data-nonempty="">{}</script> </div> </div> <div data-display-if="input.breaks == &#39;custom&#39;"> <div class="form-group shiny-input-container"> <label class="control-label" for="breakCount">Break Count</label> <input class="js-range-slider" id="breakCount" data-min="1" data-max="1000" data-from="10" data-step="1" data-grid="true" data-grid-num="9.99" data-grid-snap="false" data-keyboard="true" data-keyboard-step="0.1001001001001" data-drag-interval="true" data-data-type="number" data-prettify-separator=","/> </div> </div> </div> </form> </div>