feat: Add input_submit_textarea() input element

[cpsievert]

Adds input_submit_textarea(), a new input control that's akin to shiny::textAreaInput(), but delays the sending of an input value until a corresponding button is pressed.

Here is a hello world example:

library(shiny)
library(bslib)

ui <- page_sidebar(
  title = "Hello input_submit_textarea()",
  input_submit_textarea("text", placeholder = "Enter input to submit"),
  textOutput("value")
)

server <- function(input, output, session) {
  output$value <- renderText({
    Sys.sleep(1)
    paste("You entered:", input$text)
  })
}

shinyApp(ui, server)

TODO

• Tests
• Port to PyShiny
• Docs (component gallery)?

[gadenbuie]

Nice! 🏄‍♂️

[Copilot]

Pull Request Overview

Copilot reviewed 11 out of 18 changed files in this pull request and generated 4 comments.

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