A validation function, suitable for use with InputValidator$add_rule(), that checks whether an input value looks like a valid email address.
sv_email(
message = "Not a valid email address",
allow_multiple = FALSE,
allow_na = FALSE
)The validation error message to use if a value doesn't match a regex pattern for email address detection.
If FALSE (the default), then the length of the input vector must be exactly one; if TRUE, then any length is allowed (including a length of zero; use sv_required() if one or more values should be required).
If FALSE, then any NA element will cause validation to fail.
The sv_url() function, another specialized regex-based function for validating URLs. For general regex-based validation the sv_regex() function is useful.
Other rule functions: compose_rules(), sv_between(), sv_equal(), sv_gte(), sv_gt(), sv_in_set(), sv_integer(), sv_lte(), sv_lt(), sv_not_equal(), sv_numeric(), sv_optional(), sv_regex(), sv_required(), sv_url()
## Only run examples in interactive R sessions
if (interactive()) {
library(shiny)
library(shinyvalidate)
ui <- fluidPage(
textInput("email", "Email")
)
server <- function(input, output, session) {
# Validation rules are set in the server, start by
# making a new instance of an `InputValidator()`
iv <- InputValidator$new()
# Basic usage: `sv_email()` works well with its
# defaults; a message will be displayed if the
# validation of `input$email` fails
iv$add_rule("email", sv_email())
# Finally, `enable()` the validation rules
iv$enable()
}
shinyApp(ui, server)
}
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