shinyStep: User-Editable R Functions in 'Shiny' Apps with a Step Debugger
A pair of 'Shiny' modules that let end users of a 'Shiny'
application author their own R functions directly in the browser. Host
apps can expose these modules as extension points where user-supplied
code augments or replaces built-in logic, without requiring users to
modify the app's source. Each module embeds an 'Ace' editor with a
structured argument table, an in-frame R console rooted in the paused
function's local environment, and a step debugger that handles for,
while, repeat, and if/else blocks at any nesting depth. Two
module flavours are provided: solo editors for testing a function in
isolation with literal argument values, and embedded editors for
pausing a function mid-execution inside a larger host program.
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