Diagnose myIO Rendering Errors — myIO_last

Prints guidance on how to find the most recent JavaScript error from a myIO widget. In Shiny, errors are available as reactive inputs. Outside Shiny, errors appear in the browser's developer console.

Usage

myIO_last_error(outputId = NULL)

Arguments

outputId: optional Shiny output ID (character string). If provided, prints the exact Shiny input key to read.

Value

Invisibly returns NULL. Called for its side effect (printing diagnostic guidance).

Examples

myIO_last_error()
#> myIO: To debug rendering issues:
#>   1. Open your browser's developer console (F12)
#>   2. Look for warnings prefixed with [myIO]
#>   3. In Shiny, read: input$`myIO-{outputId}-error`
myIO_last_error("chart1")
#> myIO: Read the last error for 'chart1' with:
#>   input$`myIO-chart1-error`
#> 
#> Outside Shiny, open the browser console (F12) and look for:
#>   [myIO] Layer '...' removed: ...
#>   [myIO] Render error: ...