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13th July 2018
Recently have been working on att, where I had to share some JS lists with the R serverside code. I found out that R V8 package is obviously not able to run in the browser so things cannot be as rosey as they are in Node. Here is how it worked:
//Shared.js file
global.list = [1, 2, 3]
The R V8 package, without other libraries is not able to use CommonJS (modules.exports) keywords. That is why we use the global keyword. I found out it is shared between the V8 engine and the React based code (Node environment).
# plumber.R file
ct <- V8::v8()
ct$source('Shared.js'))
list <- ct$get("global.list")
# [1] 1 2 3
We cannot use import as Shared.js does not use modules.
//test.js
require('./Shared.js')
console.log("global.list")
[ 1, 2, 3 ]