Using set_options(hover_duration = 2000) works in this example:
library(ggvis)
mtcars %>%
ggvis(~wt, ~mpg) %>%
layer_points(fill.hover := "red") %>%
set_options(hover_duration = 2000)
However, the option does not appear to work on the hover of tooltips, such as this one:
mtcars %>%
ggvis(~wt, ~mpg) %>%
layer_points(fill.hover := "red") %>%
add_tooltip(function(x)
"<a href='http://www.google.com'>link here</a>", "hover") %>%
set_options(hover_duration = 2000)
Any ideas on how to make the tooltip stay up long enough to click the link?