<embed-page/>
<embed-page/> mimicks the window object in context of postMessage() API. See postMessage for details.
postMessage-app.html listens to "message" event and appends data to log matrix. It is served within IFRAME and two embed-page instances. The common load sequence is 1. postMessage-app.js listens for "message" event. 2. postMessage-app.js will send to opener message with own URL. 3. "message" event handler appends data to log table IFRAME 1-3. as in common part. 4. ?from=iframe added to page log matrix 5. Click here to post to IFRAME, observe appearance of ?from=demo inside of IFRAME log matrix embed-page - main 1-3. as in common part. 4. observe ?from=epa0 in page log matrix 5. Click here to post to epa, observe appearance of ?from=demo within epa log matrix embed-page - second 1-4. as in embed-page - main part. 5. Click here to post to epa, observe appearance of ?from=demo within epa log matrix