#' Adds .active() method to the chart
#'
#' Function to define the key associated with the active parts .
#' See options: \href{https://github.com/alexandersimoes/d3plus/wiki/Visualizations#active}{d3plus wiki page}.
#'
#' @import htmlwidgets
#'
#' @export
#'
d3plusActive <- function(d3plus, value = NULL, ...){
x <- c(as.list(environment())[-1], list(...))
d3plus$x$d3plusActive <- toJSON(x,
auto_unbox = T,
force = T,
json_verbatim = T)
d3plus
}
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