atom-shell-issue-991

index1.html

<h1>Hi, I'm index1.html aka win1</h1>

<script>
	function sendIpcMsg() {
		var ipc = require('ipc');
		ipc.send('my-msg', 'hi');
	}
</script>

index2.html

<h1>Hi, I'm index2.html aka win2</h1>

<script>
	var ipc = require('ipc');
	ipc.on('my-msg', function(arg) {
		console.log('this was sent from win1', arg);
	});
</script>

main.js

var app = require('app');
var BrowserWindow = require('browser-window');
var ipc = require('ipc');

app.on('ready', function() {
  win1 = new BrowserWindow({
     "width": 400,
     "height": 600
  });
  win1.loadUrl('file://' + __dirname + '/index1.html');
  win1.show();
  win1.openDevTools();

  win2 = new BrowserWindow({
     "width": 400,
     "height": 600
  });
  win2.loadUrl('file://' + __dirname + '/index2.html');
  win2.show();
  win2.openDevTools();

  ipc.on('my-msg', function(event, arg) {
    win2.webContents.send('my-msg', arg);
  });
});

package.json

{
"name": "atom-shell-issue-991",
"main": "main.js"
}