shiny 1.10.0

New features and improvements

• When busy indicators are enabled (i.e., useBusyIndicators() is in the UI), Shiny now:

  • Shows the pulse indicator when dynamic UI elements are recalculating and no other spinners are visible in the app. (#4137)
  • Makes the pulse indicator slightly smaller by default and improves its appearance to better blend with any background. (#4122)

• Improve collection of deep stack traces (stack traces that are tracked across steps in an async promise chain) with {coro} async generators such as {elmer} chat streams. Previously, Shiny treated each iteration of an async generator as a distinct deep stack, leading to pathologically long stack traces; now, Shiny only keeps/prints unique deep stack trace, discarding duplicates. (#4156)

• Added an example to the ExtendedTask documentation. (@daattali #4087)

Bug fixes

• Fixed a bug in conditionalPanel() that would cause the panel to repeatedly show/hide itself when the provided condition was not boolean. (@kamilzyla, #4127)

• Fixed a bug with sliderInput() when used as a range slider that made it impossible to change the slider value when both handles were at the maximum value. (#4131)

• dateInput() and dateRangeInput() no longer send immediate updates to the server when the user is typing a date input. Instead, it waits until the user presses Enter or clicks out of the field to send the update, avoiding spurious and incorrect date values. Note that an update is still sent immediately when the field is cleared. (#3664)

• Fixed a bug in onBookmark() hook that caused elements to not be excluded from URL bookmarking. (#3762)

• Fixed a bug with stack trace capturing that caused reactives with very long async promise chains (hundreds/thousands of steps) to become extremely slow. Chains this long are unlikely to be written by hand, but {coro} async generators and {elmer} async streaming were easily creating problematically long chains. (#4155)

• Duplicate input and output IDs -- e.g. using "debug" for two inputs or two outputs -- or shared IDs -- e.g. using "debug" as the inputId for an input and an output -- now result in a console warning message, but not an error. When devmode() is enabled, an informative message is shown in the Shiny Client Console. We recommend all Shiny devs enable devmode() when developing Shiny apps locally. (#4101)

• Updating the choices of a selectizeInput() via updateSelectizeInput() with server = TRUE no longer retains the selected choice as a deselected option if the current value is not part of the new choices. (@dvg-p4 #4142)

• Fixed a bug where stack traces from observeEvent() were being stripped of stack frames too aggressively. (#4163)

shiny 1.9.1

Bug fixes

• Fixed a bug introduced in v1.9.0 where the boundaries of hover/click/brush regions on plots were being incorrectly scaled when browser zoom was used. (#4111)

shiny 1.9.0

New busy indication feature

Add the new useBusyIndicators() function to any UI definition to:

1. Add a spinner overlay on calculating/recalculating outputs.
2. Show a page-level pulsing banner when Shiny is busy calculating something (e.g., a download, side-effect, etc), but no calculating/recalculating outputs are visible.

In a future version of Shiny, busy indication will be enabled by default, so we encourage you to try it out now, provide feedback, and report any issues.

In addition, various properties of the spinners and pulse can be customized with busyIndicatorOptions(). For more details, see ?busyIndicatorOptions. (#4040, #4104)

New features and improvements

• The client-side TypeScript code for Shiny has been refactored so that the Shiny object is now an instance of class ShinyClass. (#4063)

• In TypeScript, the Shiny object has a new property initializedPromise, which is a Promise-like object that can be awaited or chained with .then(). This Promise-like object corresponds to the shiny:sessioninitialized JavaScript event, but is easier to use because it can be used both before and after the events have occurred. (#4063)

• Output bindings now include the .recalculating CSS class when they are first bound, up until the first render. This makes it possible/easier to show progress indication when the output is calculating for the first time. (#4039)

• A new shiny.client_devmode option controls client-side devmode features, in particular the client-side error console introduced in shiny 1.8.1, independently of the R-side features of shiny::devmode(). This usage is primarily intended for automatic use in Shinylive. (#4073)

• Added function reactlogAddMark() to programmatically add _mark_ed locations in the reactlog log without the requirement of keyboard bindings during an idle reactive moment. (#4103)

Bug fixes

• downloadButton() and downloadLink() are now disabled up until they are fully initialized. This prevents the user from clicking the button/link before the download is ready. (#4041)

• Output bindings that are removed, invalidated, then inserted again (while invalidated) now correctly include the .recalculating CSS class. (#4039)

• Fixed a recent issue with uiOutput() and conditionalPanel() not properly lower opacity when recalculation (in a Bootstrap 5 context). (#4027)

• Image outputs that were scaled by CSS had certain regions that were unresponsive to hover/click/brush handlers. (#3234)

shiny 1.8.1.1

In v1.8.1, shiny.js starting throwing an error when input/output bindings have duplicate IDs. This error is now only thrown when shiny::devmode(TRUE) is enabled, so the issue is still made discoverable through the JS error console, but avoids unnecessarily breaking apps that happen to work with duplicate IDs. (#4019)

shiny 1.8.1

New features and improvements

• Added ExtendedTask, a new simple way to launch long-running asynchronous tasks that are truly non-blocking. That is, even within a session, an ExtendedTask won't block the main thread from flushing the reactive graph (i.e., UI updates won't be blocked). ExtendedTask pairs nicely with new bslib::input_task_button() and bslib::bind_task_button() functions, which help give user feedback and prevent extra button clicks. (#3958)

• Added a JavaScript error dialog, reporting errors that previously were only discoverable by opening the browser's devtools open. Since this dialog is mainly useful for debugging and development, it must be enabled with shiny::devmode(). (#3931)

• runExamples() now uses the {bslib} package to generate a better looking result. It also gains a package argument so that other packages can leverage this same function to run Shiny app examples. For more, see ?runExamples. (#3963, #4005)

• Added onUnhandledError() to register a function that will be called when an unhandled error occurs in a Shiny app. Note that this handler doesn't stop the error or prevent the session from closing, but it can be used to log the error or to clean up session-specific resources. (thanks @JohnCoene, #3993)

Changes

• renderDataTable()/dataTableOutput() are officially deprecated in favor of their {DT} equivalents. Migrating to {DT}, in most cases, just requires changing renderDataTable() to DT::renderDT() and dataTableOutput() to DT::DTOutput(). Also, to promote migration, when a recent version of {DT} is available, renderDataTable()/dataTableOutput() now automatically use their {DT} equivalent (and provide a message that they are doing so). If this happens to degrade an existing app, set options(shiny.legacy.datatable = TRUE) to get the old (i.e., non-{DT}) implementation. (#3998)

• Both conditionalPanel() and uiOutput() are now styled with display: contents by default in Shiny apps that use Bootstrap 5. This means that the elements they contain are positioned as if they were direct children of the parent container holding the conditionalPanel() or uiOutput(). This is probably what most users intend when they use these functions, but it may break apps that applied styles directly to the container elements created by these two functions. In that case, you may include CSS rules to set display: block for the .shiny-panel-conditional or .shiny-html-output classes. (#3957, #3960)

Bug fixes

• Notifications are now constrained to the width of the viewport for window widths smaller the default notification panel size. (#3949)

• Fixed #2392: downloadButton() now visibly returns its HTML tag so that it renders correctly in R Markdown and Quarto output. (Thanks to @fennovj, #2672)

• Calling updateSelectizeInput() with choices and selected now clears the current selection before updating the choices and selected value. (#3967)

• Loading a Shiny app in a package-like directory will no longer warn if autoloading is disabled by the presence of an R/_disable_autoload.R file. (Thanks to @krlmlr and @tanho63, #3513)

shiny 1.8.0

Breaking changes

• Closed #3899: The JS function Shiny.bindAll() is now asynchronous. This change is driven by the recent push toward making dynamic UI rendering asynchronous, which is necessary for shinylive (and should've happened when it was first introduced in Shiny v1.7.5). The vast majority of existing Shiny.bindAll() uses should continue to work as before, but some cases may break if downstream code relies on it being synchronous (i.e., blocking the main thread). In this case, consider placing any downstream code in a .then() callback (or await the result in a async function). (#3929)
  • Since renderContent() calls bindAll() (after it inserts content), it now returns a Promise<void> instead of void, which can be useful if downstream code needs to wait for the binding to complete.

New features and improvements

• Updated selectizeInput()'s selectize.js dependency from v0.12.4 to v0.15.2. In addition to many bug fixes and improvements, this update also adds several new plugin options. (#3875)

• Shiny's CSS styling (for things like showNotification(), withProgress(), inputPanel(), etc.), has been updated with {bslib}'s upcoming CSS-only dark mode feature in mind. (#3882, #3914)

• Default styles for showNotification() were tweaked slightly to improve accessibility, sizing, and padding. (#3913)

• Shiny inputs and {htmlwidgets} are no longer treated as draggable inside of absolutePanel()/fixedPanel() with draggable = TRUE. As a result, interactions like zooming and panning now work as expected with widgets like {plotly} and {leaflet} when they appear in a draggable panel. (#3752, #3933)

• For InputBindings, the .receiveMessage() method can now be asynchronous or synchronous (previously it could only be synchronous). (#3930)

Bug fixes

• fileInput() no longer has unwanted round corners applied to the buttonLabel. (#3879)

• Fixed #3898: wrapFunctionLabel() no longer throws an error if the name is longer than 10000 bytes. (#3903)

shiny 1.7.5.1

Bug fixes

• On r-devel (R > 4.3.1), isTruthy(NULL) now returns FALSE (as it does with older versions of R). (#3906)

shiny 1.7.5

Possibly breaking changes

• For reactiveValues() objects, whenever the $names() or $values() methods are called, the keys are now returned in the order that they were inserted. (#3774)

• The value provided to options(shiny.json.digits) is now interpreted as number of digits after the decimal instead of significant digits. To treat the value as significant digits, wrap it in I() (e.g., options(shiny.json.digits = I(4))). This new default behavior not only helps with reducing digits in testing snapshots, but is also more consistent with {jsonlite}'s default behavior. (#3819)

New features and improvements

• Closed #789: Dynamic UI is now rendered asynchronously, thanks in part to the newly exported Shiny.renderDependenciesAsync(), Shiny.renderHtmlAsync(), and Shiny.renderContentAsync(). Importantly, this means <script> tags are now loaded asynchronously (the old way used XMLHttpRequest, which is synchronous). In addition, Shiny now manages a queue of async tasks (exposed via Shiny.shinyapp.taskQueue) so that order of execution is preserved. (#3666)

• Fixes #3840: updateSliderInput() now warns when attempting to set invalid min, max, or value values. Sending an invalid update message to an input no longer causes other update messages to fail. (#3843)

• sliderInput() now has a larger target area for clicking or tapping on the slider handle or range. (#3859)

• Closed #2956: Component authors can now prevent Shiny from creating an input binding on specific elements by adding the data-shiny-no-bind-input attribute to the element. The attribute may have any or no value; its presence will prevent binding. This feature is primarily useful for input component authors who want to use standard HTML input elements without causing Shiny to create an input binding for them. Additionally, Shiny now adds custom classes to its inputs. For example, checkboxInput() now has a shiny-input-checkbox class. These custom classes may be utilized in future updates to Shiny's input binding logic. (#3861)

• Map objects are now initialized at load time instead of build time. This avoids potential problems that could arise from storing fastmap objects into the built Shiny package. (#3775)

Bug fixes

• Fixed #3771: Sometimes the error ion.rangeSlider.min.js: i.stopPropagation is not a function would appear in the JavaScript console. (#3772)

• Fixed #3833: When width is provided to textAreaInput(), we now correctly set the width of the <textarea> element. (#3838)