Upgrade notes for Shiny 0.13.0

• Fixed #962: plot interactions did not work with the development version of ggplot2 (after ggplot2 1.0.1).

• Fixed #902: the drag_drop plugin of the selectize input did not work.

• Fixed #933: updateSliderInput() does not work when only the label is updated.

• Multiple imageOutput/plotOutput calls can now share the same brush id. Shiny will ensure that performing a brush operation will clear any other brush with the same id.

• Added placeholder option to textInput.

• Improved support for Unicode characters on Windows (#968).

• Fixed bug in selectInput and selectizeInput where values with double quotes were not properly escaped.

• runApp() can now take a path to any .R file that yields a shinyApp object; previously, the path had to be a directory that contained an app.R file (or server.R if using separately defined server and UI). Similarly, introduced shinyAppFile() function which creates a shinyApp object for an .R file path, just as shinyAppDir() does for a directory path.

• Introduced Shiny Modules, which are designed to 1) simplify the reuse of Shiny UI/server logic and 2) make authoring and maintaining complex Shiny apps much easier. See the article linked from ?callModule.

• invalidateLater and reactiveTimer no longer require an explicit session argument; the default value uses the current session.

• Added session$reload() method, the equivalent of hitting the browser’s Reload button.

• Added shiny.autoreload option, which will automatically cause browsers to reload whenever Shiny app files change on disk. This is intended to shorten the feedback cycle when tweaking UI code.

• Errors are now printed with stack traces! This should make it tremendously easier to track down the causes of errors in Shiny. Try it by calling stop("message") from within an output, reactive, or observer. Shiny itself adds a lot of noise to the call stack, so by default, it attempts to hide all but the relevant levels of the call stack. You can turn off this behavior by setting options(shiny.fullstacktrace=TRUE) before or during app startup.

• Fixed #1018: the selected value of a selectize input is guaranteed to be selected in server-side mode.

• Added req function, which provides a simple way to prevent a reactive, observer, or output from executing until all required inputs and values are available. (Similar functionality has been available for a while using validate/need, but req provides a much simpler and more direct interface.)

• Improve stability with Shiny Server when many subapps are used, by deferring the loading of subapp iframes until a connection has first been established with the server.

• Upgrade to Font Awesome 4.5.0.

• Upgraded to Bootstrap 3.3.5.

• Upgraded to jQuery 1.12.4

• Switched to an almost-complete build of jQuery UI with the exception of the datepicker extension, which conflicts with Shiny’s date picker.

• Added fillPage function, an alternative to fluidPage, fixedPage, etc. that is designed for apps that fill the entire available page width/height.

• Added fillRow and fillCol functions, for laying out proportional grids in fillPage. For modern browsers only.

• Added runGadget, paneViewer, dialogViewer, and browserViewer functions to support Shiny Gadgets. More detailed docs about gadgets coming soon.