Shiny Try Catch

Catch multiple errors and warnings, and forward them as an alert. If an error occurs, NULL is returned. If a warning occurs, the result is returned. Please, add shinyjs::useShinyjs() to the UI to enable the alerts.

Usage

shinyTryCatch(
  expr,
  errorTitle = "Modeling failed",
  warningTitle = "",
  alertStyle = "shinyjs",
  inShiny = TRUE,
  suppressWarnings = FALSE
)

Arguments

expr

expression to be evaluated.

errorTitle

(character) error message title.

warningTitle

(character) warning message title.

alertStyle

(character) Either "shinyjs", or "shinyalert". Specifies how an error or a warning is given out. If "shinyjs" than shinyjs::alert is used; if "shinyalert" than shinyalert::shinyalert is used.

inShiny

(logical) if FALSE prevents an alert in shiny, but instead a warning will be displayed. Use this when not applied within a Shiny session.

suppressWarnings

(logical) if TRUE, warnings are suppressed and not given out as an alert.