moduleserve | Development shim for serving up CommonJS modules

• As of Shiny 1.5.0, we are encouraged to use moduleServer rather than callModule.
• However, it appears as though we can't pass additional parameters to moduleServer (unlike callModule).
• This is an issue because I'd like to pass the parent session as a parameter to moduleServer, so that I can correctly reference the parent session in order for updateTabsetPanel to work correctly inside a renderUI dynamic output.

This post demonstrates how to use callModule to pass the parent session into the module so that updateTabsetPanel can reference the parent session and update it accordingly. I used that approach to create a minimal example here. There are two tabPanels, and we are trying to navigate to the second via an actionLink in the first. The first_server module is called with callModule, and we are able to pass the parent session parameter as an additional argument, allowing us to reference it in the updateTabsetPanel call in first_server. Clicking the actionLink then takes us to the second module UI, as expected:

I'm trying to create multiple plots using modules, each plot with it's own input. But when I tried to run the app, only the inputs are added each time I add using insertUI and the plot output is blank.

I've tried connecting the ui and the server modules with the same id ("hist1") but it doesn't seem to connect each individual module.

In a Shiny app, I’m trying to disable/enable an action button in the UI of the main app based on user's input from a module. Basically, I want the “Next Page” (submit) button to be disabled until the user responds to the last item (item3). When the user responds to the last item, I want the button to be enabled. However, my app isn’t updating the toggle state of the action button.

Here’s a minimal reproducible example using a {Golem} structure:

app_ui.R:

I need to set NULL to reactive when a button is clicked. In my example below 'data' (as module parameter) is passed as reactive from other module. Now, I want to click button and set NULL to reactiveExpr. The way I'm doing it here is not working. I don't need set NULL to reactive base on any condition, just by clicking the button.

Here is the main / only docs on server-side selectize from RStudio. Following the example in this article, I have created the example below. The main goal of the code below is to render the input as a server-size selectize input. Note that the fetching of options for the select happens globally near the top of our app.R file - we fetch data for the named character vector namelist_nba, which we use as the value for choices. For reproducibility, I have commented out our data fetching code & have hard-coded the top 20 responses:

app.R - you should be able to run this.

In my example I need to access leaflet map from module 2 (nested) and use input$ on a map to return polygon coordinates. It works perfectly when I do this in my main module (module 1) where I can freely refer to 'map'. Unfortunately, when I pass map to another module (module 2) then the same trick with input$ doesn't work at all. Do you know how to solve it?

Here is the reproducible example. Please draw rectangle on a map and see that no coordinates are returned to the text area. But if you uncomment my gray code (in module 1) then you will see all works fine.

i am struggling with the logic of updating a button in the ui based on code that is living in a module. When I click the button i want it to change the colour but nothing happens. I understand to make ui input reactive in order to use it in the server module but i do not get it working the other way around. Help (and some explanation) is highly appreciated!

here is my code: (I left the save to csv part upon click as i got that to work).

I want to refer to the namespace ns("map") from second server module mod_btn_server2. This module is nested in first server module mod_btn_server1. When I click 'Button 2' points should show up on a map but they didn't. Is it possible at all to refer to "map" from nested module?

Here's working example:

For some reason I need to nest modules. I passed button to nested module mod_coordinates_server but when I click the button points do not show up on the map. I used here reactive and button is passed correctly - when you uncomment print(btn()) (in observeEvent) you'll see that values are returned to console properly. It means that button works corectly. So why it doesn't work for points? Is it something wrong with namespace?

Below working example: