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plainjs - window.postmessage and iframes - 2.js
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| function receiveMessage(event) { | |
| if (event.origin === "http://iframe.com" | |
| && event.data === "message we expect" | |
| && event.data.length === 19 | |
| && typeof event.data === 'string') { | |
| // execute code | |
| } | |
| } | |
| // event listener for message event | |
| window.addEventListener("message", receiveMessage, false); |
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