messaging between window and iframe, popups, and new windows (example uses iframe)

index.js

// messaging between the parent window and an iframe, popup, or new window (this example uses iframe)

var iframe = require('iframe')

var $ = function(){
  this.addEventListener('message', function(msg){
    console.log(msg.data.message)
    msg.source.postMessage('thanks for the msg', '*')
  })
}

var body = '<script type=text/javascript>(' + ($ + '()') + ')</script>'

var frame = iframe({body: body})

setInterval(function(){
  frame.iframe.contentWindow.postMessage({message: 'hey'}, '*')
}, 1000)

window.onmessage = function(msg){
  console.log(msg.data)
}