jrc

An R package to exchange commands between R and JavaScript. It opens a new or an existing web page and establishes a websocket connection to the currently running R session.

Installation

install.packages("jrc")

Usage

Main R functions are sendData(), sendCommand(), and sendHTML(). The first one sends a variable from the R session to the web page, the second one executes a JavaScript code, and the last one adds some HTML to the web page. Their JavaScript counterparts are jrc.sendData() and jrc.sendCommand().

openPage() and closePage() respectively opens and closes a web page.

This example opens a new page and adds there a button, that increases value of k by one in the R session.

library(jrc)

k <- 0
openPage()
sendCommand(paste0("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"))