shiny
htmltools
req()
seq()
on.exit()
observe()
isolate
observeEvent
eventReactive
reactiveTimer()
invalidateLater(ms)
git
If you create a new object R6 object.
y1 <- R6::R6Class("Y", list(a = 1, b = 1))$new()
An you copy that object.
y2 <- y1