[Javascript Language Interface] Run with node can be spawned as a subprocess from another language and acts as a wrapper for js code. #interface

JSLangInterface.js

var state = {
  prop: undefined
  doSomething: (envName) => {},
  doSomethingElse: (_) => {},
  setProp: (v) => {
  	this.prop = v
  },
}

process.stdin.setEncoding('utf-8')
process.stdout.setEncoding('utf-8')
process.stdin.on('readable', () => {
  const content = process.stdin.read()
  if(!!content) {
    let data = parseContent(content)
    let response = state[data.cmd](data.args)
    process.stdout.write(prepareResp(response))
  }
})


function prepareResp(data){
  dataJSON = JSON.stringify(data)
  return `${dataJSON}\n`
}

function parseContent(content){
  let data = JSON.parse(content)
  return data
}