Basic Cross Sandbox Communication for iOS 8 Action Extensions

gistfile1.js

// Append the transfer dom to the document.
var transferDOM = document.createElement('div');
transferDOM.style.display = 'none';
transferDOM.id = 'transferdom';
document.body.appendChild(transferDOM);

function injectScript(fn) {
    var script = document.createElement('script');
    script.appendChild(document.createTextNode('(' + fn + ')();'));
    document.body.appendChild(script);
}

function someScripToInjectIntoBrowserContext() {
    (function() {
       var transferDOM = document.getElementById("transferdom");
       window.Microsoft = "assigned";
       console.log("Browser Context : window.Microsoft = " + window.Microsoft);
       window.addEventListener('ExtensionContextEvent', onMessageReceived);

       // Script is ready inform the extension context.
       function dispatch(msg) {
           console.log("Browser Context : Dispatching: " + msg);
           transferDOM.innerText = msg;
           var transferEvent = document.createEvent('Event');
           transferEvent.initEvent('BrowserContextEvent', true, true);
           window.dispatchEvent(transferEvent);
       }

       dispatch("ready");

       function onMessageReceived() {
           var data = transferDOM.innerText;
           console.log("Browser Context : DataReceived : " + data);
           dispatch("Microsoft = " + window.Microsoft);
       }
    })();
}

function dispatch(msg) {
       console.log("Extension Context : Dispatching: " + msg);
       transferDOM.innerText = msg;
       var transferExtensionEvent = document.createEvent('Event');
       transferExtensionEvent.initEvent('ExtensionContextEvent', true, true);
       window.dispatchEvent(transferExtensionEvent);
}

window.addEventListener('BrowserContextEvent', onMessageReceived);
function onMessageReceived() {
    var data = transferDOM.innerText;
    console.log("Extension Context : DataReceived : " + data);

    if (data == 'ready') {
       // Dispatch an event to fetch the Microsoft variable.
       dispatch("fetch");
    }
}
console.log("Extension Context : window.Microsoft = ", window.Microsoft);

// Injects some code into the Browser Context
injectScript(someScripToInjectIntoBrowserContext);

http://mohamedmansour.svbtle.com/how-to-communicate-between-javascript-sandboxes-1