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Showing content from https://rstudio.github.io/shinyvalidate/reference/input_provided.html below:

Check whether an input value has been provided — input_provided • shinyvalidate

This function takes an input value and uses heuristics to guess whether it represents an "empty" input vs. one that the user has provided. This will vary by input type; for example, a shiny::textInput() is "" when empty, while a shiny::numericInput() is NA.

input_provided returns TRUE for all values except:

• NULL

• ""

• An empty atomic vector or list

• An atomic vector that contains only missing (NA) values

• A character vector that contains only missing and/or "" values

• An object of class "try-error"

• A value that represents an unclicked shiny::actionButton()

val

Values to test for availability in a Shiny context.

A logical vector of length 1.

This function is based on shiny::isTruthy() but tweaked here in shinyvalidate to change the treatment of FALSE values: isTruthy(FALSE) returns FALSE, but input_provided(FALSE) returns TRUE. This difference is motivated by shiny::checkboxInput(), where isTruthy() answers the question of "is the input present and checked" while input_provided is just "is the input present".

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