index.html

<h1>Hello World!</h1>

<script>
     var remote = require('electron').remote;     

     // show initial value from main process (in dev console)
     console.log(remote.getGlobal('sharedObj').prop1);     

     // change value of global prop1
     var zyrename = remote.getGlobal('sharedObj').prop1;     

     // show changed value in main process (in stdout, as a proof it was changed)
     var ipcRenderer = require('electron').ipcRenderer;     
     ipcRenderer.send('show-prop1');                       

     // show changed value in renderer process (in dev console)
     console.log(remote.getGlobal('sharedObj').prop1);
</script>

<script>
document.write('<p>zyre.name: ' + zyrename + '</p>');
document.write('<p>electron.version: ' + process.versions.node + '</p>')
</script>