Prevent interacting with input choices.
enableInput(id, values = NULL, invert = FALSE,
session = getDefaultReactiveDomain())disableInput(id, values = NULL, invert = FALSE, reset = FALSE,
session = getDefaultReactiveDomain())
A character string specifying the id of an input.
A vector specifying values to enable or disable.
One of TRUE or FALSE, if TRUE choices which do not have
a matching value are enabled or disabled, defaults to FALSE.
A reactive context, defaults to getDefaultReactiveDomain().
One of TRUE or FALSE, if TRUE choices are all enabled
prior to disabling choices, defaults to FALSE.
Other utilities: invalidateInput,
updateInput