用shinyjs改变shinydashboard盒的样式

Question

我正试图根据用户所在的选项卡更改shinydashboard框的颜色。为此，我将从tabsetPanel获取输入值，并尝试使用shinyjs更改box-header类的css。不幸的是，我的试验都没有成功。下面是一个可复制的示例(颜色还不适合选项卡，但我将在第二部分中这样做)

library(shiny)
ui <- fluidPage(
  shinyWidgets::useShinydashboard(),
  tabsetPanel(
    id = "mytab",
    tabPanel("First",
             shinydashboard::box(status = "primary",
                                 title = "mybox",
                                 solidHeader = TRUE, collapsible = TRUE,
                                 sliderInput("orders", "Orders", min = 1, max = 2000, value = 650)
                                 )),
  tabPanel("Second", p("Second tab"))))

server <- function(input, output) {
  observeEvent(input$mytab,{
    shinyjs::runjs("$('.box-header').css('background', 'red');")
    shinyjs::runjs("$('.box.box-solid.box-primary > .box-header').attr('style', 'background:red !important');")
  })
}
shinyApp(ui = ui, server = server)

我尝试了对runjs的第一个和第二个调用之间的所有组合，但都失败了。

Answer 1

您只是在useShinyjs()中丢失了ui。尝尝这个

library(shiny)
ui <- fluidPage(
  useShinyjs(),
  shinyWidgets::useShinydashboard(),
  #tabBox( id = "mytab", width=6, title = "My Test Plot",
  tabsetPanel(id = "mytab",
    tabPanel("First", value="tab1",
             shinydashboard::box(status = "primary",
                                 title = "mybox",
                                 solidHeader = TRUE, collapsible = TRUE,
                                 sliderInput("orders", "Orders", min = 1, max = 2000, value = 650)
             )),
    tabPanel("Second", value="tab2", p("Second tab"),
             shinydashboard::box(status = "warning",
                                 title = "mybox",
                                 solidHeader = TRUE, collapsible = TRUE,
                                 sliderInput("orders2", "Orders", min = 1, max = 2000, value = 950)
             ))
    )
  )

server <- function(input, output) {
  observeEvent(input$mytab,{
    if (input$mytab=="tab1"){
      shinyjs::runjs("$('.box-header').css('background', 'red');")
      shinyjs::runjs("$('.box.box-solid.box-primary > .box-header').attr('style', 'background:red !important');")
    } else if (input$mytab=="tab2"){
      shinyjs::runjs("$('.box-header').css('background', 'blue');")
      shinyjs::runjs("$('.box.box-solid.box-primary > .box-header').attr('style', 'background:blue !important');")
    }
    
  })
}
shinyApp(ui = ui, server = server)

Answer 2

https://rstudio.github.io/shinydashboard/appearance.html#css

    ## ui.R ##
dashboardPage(
  dashboardHeader(title = "Custom font"),
  dashboardSidebar(),
  dashboardBody(
    tags$head(
      tags$link(rel = "stylesheet", type = "text/css", href = "custom.css")
    )
  )
)