https://gist.github.com/pbojinov/8965299


https://codepen.io/code4tapas/pen/mydvGR

Two way iframe communication

The main difference between the two pages is the method of sending messages. Recieving messages is the same in both.

Parent

Send messages to iframe using iframeEl.contentWindow.postMessage Recieve messages using window.addEventListener('message')

iframe

Send messages to parent window using window.parent.postMessage Recieve messages using window.addEventListener('message')

Live Example

http://pbojinov.github.io/iframe-communication/