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But it is possible to have groups of items, and it’s very easy to do.Link to code Sometimes you may need to know the value of some variable/function call in a Shiny app when you don’t have easy access to debugging tools.This example shows how to define an output variable in the server code that you can use in the UI.An alternative approach is to use the functions from the shinyjs package.Apart from providing these tips for free, I am also a Shiny consultant - if you need help with anything Shiny or R, feel free to contact me.A few very common questions in Shiny are “how do I hide/show something”, “how do I disable an input”, and “how do I reset an input”.

Link to code This simple example shows how you can have a button that, when clicked, will close the current browser tab and stop the running Shiny app (you can choose to do only one of these two actions).

Link to code When using a conditional panel in the UI, the condition is usually an expression that uses an input value.

But what happens when you want to use a conditional panel with a more complex condition that is not necessarily directly related to an input field?

Link to code This simple app demonstrates how you can fill out certain input fields when a Shiny app loads based on URL parameters.

Link to code When creating Shiny apps with a lot of code and a complex UI, it can sometimes get very messy and difficult to maintain your code when it’s all in one file.

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