Is there any way to send a message between windows which were created independently of each other? That is, the user opened Window A somehow and then Window B somehow and now I would like to send a message from A -> B. The postMessage
interface only works if I have a handle to the other window, which I do not. Both windows are on the same domain and I would know the exact URL of the other window.
Note that I'm not looking for a solution which involves one window polling a value. I can already do that with localStorage and am looking for an alternative.