v1.8.0: Unable to highlight multiple selected values at once in selectInput/selectizeInput

[etbrand]

Up until v1.7.5.1, it was possible to highlight multiple selected values in a selectInput/selectizeInput by using shift + click or ctrl + click and remove them all at once, e.g.:

library(shiny)

ui <- fluidPage(
  selectInput(
    inputId = "letters",
    label = "Letters",
    choices = LETTERS,
    selected = LETTERS,
    multiple = TRUE
  )
)

server <- function(input, output) { }

shinyApp(ui, server)

In v1.8.0, only one can be selected at a time:

This is with R 4.3.1 on Windows 10 and happens both in the RStudio viewer and on Chrome.

[gadenbuie]

Hi @etbrand. We recently updated shiny to use the latest version of selectize.js, which brought with it a large number of improvements but also a few behavior changes.

This appears to be a change in behavior caused by selectize.js. You can see in this example in their docs that it's not possible to activate multiple options from the current selection.

That said, their README clearly states:

• Select & delete multiple items at once Hold down option on Mac or ctrl on Windows to select more than one item to delete.

So this might be a bug that can be fixed by the selectize maintainers in the future.