observe()
Propertites
Every time you run the observe()
function it creates an action that can be triggered.
In the next example, every time x changes, it creates another observer, so its value is printed another time.
x <- reactiveVal(1)
y <- observe({
x()
observe(print(x()))
})
#> [1] 1
x(2)
#> [1] 2
#> [1] 2
x(3)
#> [1] 3
#> [1] 3
#> [1] 3
You should only ever create observers or outputs at the top-level of your server function.