is.singleton

singleton

A <code><a rd-options="" href="/link/tag?package=shiny&version=1.2.0" data-mini-rdoc="shiny::tag">tag</a></code>, text, <code><a rd-options="" href="/link/HTML?package=shiny&version=1.2.0" data-mini-rdoc="shiny::HTML">HTML</a></code>, or list.

Whether the object should be a singleton.

value

Use <code>singleton</code> to wrap contents (tag, text, HTML, or lists) that should
be included in the generated document only once, yet may appear in the
document-generating code more than once. Only the first appearance of the
content (in document order) will be used.

Makes it incredibly easy to build interactive web
applications with R. Automatic "reactive" binding between inputs and
outputs and extensive prebuilt widgets make it possible to build
beautiful, responsive, and powerful applications with minimal effort.

Winston Chang

shiny

Web Application Framework for R

Joe Cheng

JJ Allaire

Yihui Xie

Jonathan McPherson

 RStudio

 jQuery Foundation

 jQuery contributors

 jQuery UI contributors

Mark Otto

Jacob Thornton

 Bootstrap contributors

 Twitter, Inc

Alexander Farkas

Scott Jehl

Stefan Petre

Andrew Rowls

Dave Gandy

Brian Reavis

Kristopher Michael Kowal

 es5-shim contributors

Denis Ineshin

Sami Samhuri

 SpryMedia Limited

John Fraser

John Gruber

Ivan Sagalaev

 R Core Team

singleton function

A <code><a rd-options='' href='tag'>tag</a></code>, text, <code><a rd-options='' href='HTML'>HTML</a></code>, or list.

Include content only once — singleton

Include content only once

singleton: Include content only once

Description

Usage

Arguments