rstudio/shiny v1.12.0

shiny 1.12.0

on GitHub

OpenTelemetry support

• Shiny now supports OpenTelemetry via
  {otel}. By default, if
  otel::is_tracing_enabled() returns TRUE, then {shiny} records all
  OpenTelemetry spans. See {otelsdk}'s Collecting Telemetry
  Data for more details
  on configuring OpenTelemetry. (#4269, #4300)

• Supported values for options(shiny.otel.collect) (or
  Sys.getenv("SHINY_OTEL_COLLECT")):

  • "none" - No Shiny OpenTelemetry tracing.
  • "session" - Adds session start/end spans.
  • "reactive_update" - Spans for any synchronous/asynchronous reactive
    update. (Includes "session" features).
  • "reactivity" - Spans for all reactive expressions. (Includes
    "reactive_update" features).
  • "all" [default] - All Shiny OpenTelemetry tracing. Currently equivalent
    to "reactivity".

• OpenTelemetry spans are recorded for:

  • session_start: Wraps the calling of the server() function. Also
    contains HTTP request within the attributes.
  • session_end: Wraps the calling of the onSessionEnded() handlers.
  • reactive_update: Signals the start of when Shiny knows something is to
    be calculated. This span ends when there are no more reactive updates
    (promises or synchronous) to be calculated.
  • reactive, observe, output: Captures the calculation (including any
    async promise chains) of a reactive expression (reactive()), an observer
    (observe()), or an output render function (render*()).
  • reactive debounce, reactive throttle: Captures the calculation
    (including any async promise chains) of a debounce()d or throttle()d
    reactive expression.
  • reactiveFileReader, reactivePoll: Captures the calculation
    (including any async promise chains) of a reactiveFileReader() or
    reactivePoll().
  • ExtendedTask: Captures the calculation (including any async promise
    chains) of an ExtendedTask.

• OpenTelemetry Logs are recorded for:

  • Set reactiveVal <name> - When a reactiveVal() is set
  • Set reactiveValues <name>$<key> - When a reactiveValues() element is
    set
  • Fatal or unhandled errors - When an error occurs that causes the session
    to end, or when an unhandled error occurs in a reactive context. Contains
    the error within the attributes. To unsanitize the error message being
    collected, set options(shiny.otel.sanitize.errors = FALSE).
  • Set ExtendedTask <name> <value> - When an ExtendedTask's respective
    reactive value (e.g., status, value, and error) is set.
  • <ExtendedTask name> add to queue - When an ExtendedTask is added to
    the task queue.

• All OpenTelemetry logs and spans will contain a session.id attribute
  containing the active session ID.

New features

• updateActionButton() and updateActionLink() now accept values other than
  shiny::icon() for the icon argument (e.g., fontawesome::fa(),
  bsicons::bs_icon(), etc). (#4249)

Bug fixes and minor improvements

• Showcase mode now uses server-side markdown rendering with the
  {commonmark} package, providing support for GitHub Flavored Markdown
  features (tables, strikethrough, autolinks, task lists). While most existing
  README.md files should continue to work as expected, some minor rendering
  differences may occur due to the change in markdown processor. (#4202,
  #4201)

• debounce(), reactiveFileReader(), reactivePoll(), reactiveValues(),
  and throttle() now attempt to retrieve the assigned name for the default
  label if the srcref is available. If a value cannot easily be produced, a
  default label is used instead. (#4269, #4300)

• The default label for items described below will now attempt to retrieve the
  assigned name if the srcref is available. If a value can not easily be
  produced, a default label will be used instead. This should improve the
  OpenTelemetry span labels and the reactlog experience. (#4269, #4300)

  • reactiveValues(), reactivePoll(), reactiveFileReader(), debounce(),
    throttle(), observe()
  • Combinations of bindEvent() and reactive() / observe()
  • Combination of bindCache() and reactive()

• updateActionButton() and updateActionLink() now correctly render HTML
  content passed to the label argument. (#4249)

• updateSelectizeInput() no longer creates multiple remove buttons when
  options = list(plugins="remove_button") is used. (#4275)

• dateRangeInput()/updateDateRangeInput() now correctly considers the time
  zones of date-time objects (POSIXct) passed to the start, end, min and
  max arguments. (thanks @ismirsehregal, #4318)

Breaking changes

• The return value of actionButton() and actionLink() now wraps label
  and icon in an additional HTML container element. This allows
  updateActionButton() and updateActionLink() to distinguish between the
  label and icon when making updates, and allows spacing between label
  and icon to be more easily customized via CSS.