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55 lines
1.5 KiB
R
55 lines
1.5 KiB
R
\name{conditionalPanel}
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\alias{conditionalPanel}
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\title{Conditional Panel}
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\usage{
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conditionalPanel(condition, ...)
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}
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\arguments{
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\item{condition}{A JavaScript expression that will be
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evaluated repeatedly to determine whether the panel
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should be displayed.}
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\item{...}{Elements to include in the panel.}
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}
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\description{
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Creates a panel that is visible or not, depending on the
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value of a JavaScript expression. The JS expression is
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evaluated once at startup and whenever Shiny detects a
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relevant change in input/output.
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}
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\details{
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In the JS expression, you can refer to \code{input} and
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\code{output} JavaScript objects that contain the current
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values of input and output. For example, if you have an
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input with an id of \code{foo}, then you can use
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\code{input.foo} to read its value. (Be sure not to
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modify the input/output objects, as this may cause
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unpredictable behavior.)
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}
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\examples{
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sidebarPanel(
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selectInput(
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"plotType", "Plot Type",
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list(Scatter = "scatter",
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Histogram = "hist")),
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# Only show this panel if the plot type is a histogram
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conditionalPanel(
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condition = "input.plotType == 'hist'",
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selectInput(
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"breaks", "Breaks",
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list("Sturges",
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"Scott",
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"Freedman-Diaconis",
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"[Custom]" = "custom")),
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# Only show this panel if Custom is selected
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conditionalPanel(
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condition = "input.breaks == 'custom'",
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sliderInput("breakCount", "Break Count", min=1, max=1000, value=10)
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)
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)
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)
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}
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