sendCommand: Send a command to the server
In anders-biostat/JsRCom: Exchange commands between R and JavaScript

Description Usage Arguments Details Examples

sendCommand sends JavaScript code to the server and executes it on the currently opened page. Use JavaScript function jrc.sendCommand to send R code from the server and execute it in the current R sesion.

1	sendCommand(command)

command

A line (or several lines separated by %n) of JavaScript code. This code will be immediately executed on the opened page. No R-side syntax check is performed.

Note, that in both cases commands are executed inside a function. Therefore use for R code use <<- instead of <- to change global variables and in JavaScript use windows.varibleName = "SomeValue" or varibleName = "SomeValue". Variables declared like var variableName = "SomeValue" or variableName <- "SomeValue" will be accessable only within the current sendCommand call.

 
k <- 0
openPage()
sendCommand(str_c("button = document.createElement('input');",
              "button.type = 'button';",
              "button.addEventListener('click', function() {jrc.sendCommand('k <<- k + 1')});", 
              "button.value = '+1';",
              "document.body.appendChild(button);", collapse = "\%n"))
closePage()