javascript - window.parent.postMessage parent check what iframe sent message -

i need know iframe sent message parent window, i'll have multiple iframes on 1 iframe hosting page.

how can check of frames sent message?

you can check domain sent message. if need more identification can layer messaging system.

send messages like:

message = {     "source": "menu",     "message": "click on entry" }; 

each frame has own source. need serialize message, json works nicely.