This is a simple example of resizing {bslib} cards for a dashboard. A card can be made resizable (vertical, horizontal or both) by using the resize property. In order to use this in a {bslib} dashboard it can be added using tags$style or included in bs_theme(). Adding the resize-vertical class adds a resize anchor to …

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Plotly charts can be enhanced with custom controls. One use of controls is to update an existing chart. This post will show how to add a couple of buttons to a chart, toggling error bars on and off. It should be noted that coloring by group affects the order (and hence validity) of error bars in a Plotly plot so a …

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The {sortable} package {sortable} is an incredibly useful R package built upon the sortbale.js javascript library, allowing drag-and-drop features to be incorporated into shiny apps. The package works with two types of sortable lists: rank list: items can be sorted within a list bucket list: a single object containing …

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Serverless Shiny Inspired by Max Kuhn's presentation at R/Pharma today I tried out embedding shiny a app within a Quarto website and hosting it on GitHub pages. The app itself is a chemistry quiz built to help my son who had a school test coming up. By running it within a Quarto website it's available for him to use on …

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Shiny textInput label This is just a short post highlighing how you can move a textInput label so that it is within the textbox textInput box itself. This is a style that can be used when you have multiple textInputs and wish to preserve screen height. First we define a css class to reduce the size of the label text …

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SelectizeInput SelectizeInput is a powerful shiny widget built on the selectize.js library. The behavior of selectize.js can be extended using plugins, which are available in the shiny::selectizeInput() functon. One particularly useful plugin is "drag_drop" which allows a user to re-order the items selected …

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Here's something I've discovered that may save a huge amount of time in future development. I'm working on a shiny app that uses reads parameters from a json file and generates a series of plots from the data. It would be great to use a hot reload during the development phase so that edits to the json file can be …

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This is a simple shiny app that demonstrates dynamic shiny tabs. Each tab contains a shiny module which returns a series of data parameters and tabs can be added and removed. In one use-case this construct was used in three higher level tabs, returning a complex, nested structure. Code is available at: …

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An earlier post described a multiwindow shiny app that demonstrated how three shiny apps could be handled by a fourth with data passing between them. This extends the concept, running all apps on RStudio Connect and manages the communication using the {pins} library. Data is passed between the apps using a json file …

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Introduction Here's a simple example of working with a reactive R6 in a shiny app. It is inspired by a post to RStudio Community (https://community.rstudio.com/t/good-way-to-create-a-reactive-aware-r6-class/84890) and uses the code provided by Winston Chang to create an R6 class that is reactive. The example code is …

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