window.location.href = http://127.0.0.1:8000/security/postMessage/delivery-order.html

waiting...
Before calling postMessage
After calling postMessage
Received message: data="Received message: data="Message from parent" origin="http://127.0.0.1:8000"" origin="http://localhost:8000"
Received message: data="Received message: data="done" origin="http://127.0.0.1:8000"" origin="http://localhost:8000"