Payload of the window:message event.
A page sent a message with window.sendMessage or window.broadcast. A directed message goes only to the named window; a broadcast goes to every window except the sender's, or to every window when the sender's window cannot be found.
Payload of the
window:messageevent. A page sent a message withwindow.sendMessageorwindow.broadcast. A directed message goes only to the named window; a broadcast goes to every window except the sender's, or to every window when the sender's window cannot be found.