Question 1

How do I hide a button in Shiny using shinyjs?

Accepted Answer

Use the hide() function in your server logic after calling useShinyjs() in the UI. For example, in an observeEvent, call hide('buttonId') to hide the element with that ID, as shown in the basic usage example.

Question 2

shinyjs vs raw JavaScript: which is better for Shiny apps?

Accepted Answer

shinyjs is faster for common tasks like toggling visibility or resetting inputs without writing JS, but raw JavaScript offers more control for complex interactions. Use shinyjs for quick enhancements and raw JS when you need custom behavior beyond its functions.

Question 3

How to reset all inputs in a Shiny app?

Accepted Answer

You can use the reset() function on individual inputs, but for multiple inputs, loop through them or use a custom approach with extendShinyjs(). The README's FAQ links mention resetting inputs but doesn't provide a built-in bulk reset function.

Question 4

Can I use shinyjs with shinydashboard?

Accepted Answer

Yes, but it requires special handling. The README notes that for Shiny dashboards, you need to follow the 'Including shinyjs in different types of apps' guide to properly initialize useShinyjs() in the UI structure.

Question 5

How to add a delay in Shiny app execution?

Accepted Answer

Use the delay() function to execute R code after a specified time. For instance, delay(2000, hide('element')) will hide the element after 2 seconds, as described in the overview of main functions.

Question 6

How to call a JavaScript library function from R in Shiny?

Accepted Answer

You need to use extendShinyjs() to wrap the JavaScript function in a custom definition, then call it from R. The README's 'Calling your own JavaScript functions' section explains this, but it requires writing JavaScript code.

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