Ensure that extendShinyjs does not overwrite other shinyjs functions

R/extendShinyjs.R

@@ -247,6 +247,15 @@ extendShinyjs <- function(script, text, functions) {
     errMsg("extendShinyjs: `functions` argument must be provided. See the documentation for `?extendShinyjs` for more details.")
   }
 
+  isShinyjsFunction <- functions %in% shinyjsFunctionNames("all")
+  if (any(isShinyjsFunction)) {
+    errMsg(paste0(
+      "extendShinyjs: `functions` argument must not contain any of the ",
+      "following function names:\n",
+      paste(functions[isShinyjsFunction], collapse = ", ")
+    ))
+  }
+
   jsFuncs <- functions
 
   # add all the given functions to the shinyjs namespace so that they can be

R/useShinyjs.R

@@ -64,9 +64,7 @@ useShinyjs <- function(rmd = FALSE, debug = FALSE, html = FALSE) {
   .globals$inject <- html
 
   # all the default shinyjs methods that should be forwarded to javascript
-  jsFuncs <- c("show", "hide", "toggle", "enable", "disable", "toggleState",
-               "addClass", "removeClass", "toggleClass", "html", "onevent",
-               "alert", "logjs", "runjs", "reset", "delay", "click", "refresh")
+  jsFuncs <- shinyjsFunctionNames("core")
 
   # grab the file with all the default shinyjs javascript functions
   shiny::addResourcePath("shinyjs", system.file("srcjs", package = "shinyjs"))

R/utils.R

@@ -83,3 +83,25 @@ shinyjsInlineScript <- function(text) {
     shiny::tags$script(shiny::HTML(text))
   }
 }
+
+# names of JS functions defined by shinyjs
+shinyjsFunctionNames <- function(type = c("all", "core")) {
+  type <- match.arg(type)
+
+  # core functions are defined in JS and exported in R
+  jsFuncs <- c(
+    "show", "hide", "toggle", "enable", "disable", "toggleState",
+    "addClass", "removeClass", "toggleClass", "html", "onevent",
+    "alert", "logjs", "runjs", "reset", "delay", "click", "refresh"
+  )
+
+  if (type == "all") {
+    jsFuncs <- c(
+      jsFuncs,
+      # additional functions which are only defined on the JS side
+      "debug", "debugMessage", "getParams", "initShinyjs"
+    )
+  }
+
+  jsFuncs
+}