When an error occurs within a downloadHandler object, the app will still pop up a download window. Generally the only indication that an error has occurred is that the defaul filename and type are not right in the pop-up. In this example:

What am I doing wrong here?

What am I doing wrong here?

I have a simple shiny mechanism question and I am not understanding why and how I could answer it.
I have an app where an observeEvent action is inside a module server. This server is associated to a tabPanel.
My problem is : if I click on the button, close the modal, change panel and then go back to Home one, the modal shows again. How to prevent this behavior ? Should I “reset” the actionButton value or is it a reactivity mistake ?

I’m trying to set up the following in shiny:

I have the following UI:

Good morning all!

I have four datasets that I have shaped and combined into combined_data. I’m able to get my shiny app to work with this dataset, showing data from each separate dataframe as a different coloured line.

I am a learner of R Shiny and have built some toy apps in preparation for a serious, production-grade app.

Link to the data is here.
Hi I am developing a Shiny App. I have drop down menu with All options and the colors are consistent and transparent across the map. But I choose a particular city, it turns out into a more solid color with almost or no transparent. How can I modify the code. Here is my UI and Server code