How can I modify the inbuilt search bar of RenderDT in R Shiny to allow multiple entries separated by commas?
You can use this code:
library(shiny)
library(DT)

callback <- function(sep) {
  sprintf('
$("div.search").append($("#mySearch"));
$("#mySearch").on("keyup redraw", function(){
  var splits = $("#mySearch").val().split("%s").filter(function(x){return x !=="";})
  var searchString = "(" + splits.join("|") + ")";
  table.search(searchString, true).draw(true);
});
', sep)
}

ui <- fluidPage(
  tags$head(tags$style(HTML(".search {float: right;}"))),
  br(),
  tags$input(type = "text", id = "mySearch", placeholder = "Search"),
  DTOutput("dtable")
)

server <- function(input, output){
  
  output[["dtable"]] <- renderDT({
    datatable(
      iris[c(1, 2, 51, 52, 101, 102),],
      options = list(
        dom = "l<'search'>rtip"
      ),
      callback = JS(callback(","))
    )
  }, server = FALSE)
  
}

shinyApp(ui, server)


Personally I prefer the search builder:
datatable(
  iris[c(1, 2, 51, 52, 101, 102),],
  extensions = "SearchBuilder",
  options = list(
    dom = "Qlfrtip", 
    searchbuilder = TRUE
  )
)



I have been trying to add multiple entries on the search bar of the renderdt table function on shiny.
for example on the following code, instead of having a new search bar, i want to modify the one which is inbuilt in renderDT and allow it to take multiple entries, comma separated; for example setosa,virginica should bring rows with both setosa and virginica. I found solutions to add a new search bar but i wanted to know if i can modify this one accordingly. Any help regarding this would be highly appreciated.
if (interactive()) {
  library(shiny)
  library(DT)
  shinyApp(
    ui = fluidPage(fluidRow(column(12, DTOutput('tbl')))),
    server = function(input, output) {
      output$tbl = renderDT(
        iris, options = list(lengthChange = FALSE)
      )
    }
  )
}

i tried something like this, but this adds another search bar option and that is unnecessary
if (interactive()) {
  library(shiny)
  library(DT)
  
  shinyApp(
    ui = fluidPage(
      fluidRow(DTOutput('tbl'))
    ),
    server = function(input, output) {
      output$tbl = renderDT({
        data <- iris
        
        searchItems <- unlist(strsplit(input$search, ",")) # Split input string by commas
        searchItems <- trimws(searchItems) # Remove leading/trailing whitespace
        
        filteredData <- data[data$Species %in% searchItems, ]
        
        datatable(filteredData, options = list(lengthChange = FALSE))
      })
    }
  )
}

