sendCustomMessage在actionButton（Shiny）中无法正常工作

Question

我正在测试脚本http://shiny.rstudio.com/articles/action-buttons.html（参见＆＃34;模式1 - 命令＆＃34;）。

如果按下按钮＆＃34;点击我＆＃34;在网站上所以一切都很好 - 我们可以看到弹出菜单。

但是如果要将示例脚本复制到新的.R文件并运行它 - 没有出现弹出消息，则不会生成警告或错误消息（我的brouser是Google Chrome）。所以我对此感到困惑。

示例脚本：

library(shiny)

ui <- fluidPage(
  tags$head(tags$script(src = "message-handler.js")),
  actionButton("do", "Click Me")
)

server <- function(input, output, session) {
  observeEvent(input$do, {
    session$sendCustomMessage(type = 'testmessage',
      message = 'Thank you for clicking')
  })
}

shinyApp(ui, server) 

Answer 1

这应该有用，我给出了两个弹出警报的例子

1）使用标准from django.shortcuts import render, render_to_response from django.core.context_processors import request, csrf from django.views.decorators.csrf import csrf_protect from login.models import login_table def login(request): c = {} c.update(csrf(request)) firstname = request.POST.get('firstname') lastname = request.POST.get('lastname') email = request.POST.get('email') username = request.POST.get('username') password = request.POST.get('password') gender = request.POST.get('test') phonenumber = request.POST.get('phone') country = request.POST.get('country') data = login_table(first_name=firstname,last_name=lastname, email=email, user_name=username, password=password, gender=gender, phone=phonenumber,country=country) data.save() return render_to_response('log.html',c) def login1(request): c = {} c.update(csrf(request)) us = request.POST.get('user_name') pa = request.POST.get('password') u = login_table.objects.get(user_name='user_name') p = login_table.objects.get(password='password') if us == u and pa == p: response = render_to_response('content.html',c) else: response = render_to_response('failed.html', c) return response js

alert

2）使用rm(list = ls()) library(shiny) ui <- fluidPage( tags$head(tags$script(HTML('Shiny.addCustomMessageHandler("jsCode",function(message) {eval(message.value);});'))), actionButton("do", "Click Me") ) server <- function(input, output, session) { observeEvent(input$do, { js_string <- 'alert("Thank you for clicking");' session$sendCustomMessage(type='jsCode', list(value = js_string)) }) } shinyApp(ui, server) 包和shinyBS弹出式广告

modal