Channel messagingChannel messaging communicates one-to-one between browsing contexts on the same origin, such as between <iframe> elements or two documents using a shared worker.messagingMessagingwidely2015-09-222018-03-22https://html.spec.whatwg.org/multipage/web-messaging.html#channel-messagingchannel-messaginghttps://developer.mozilla.org/docs/Web/API/MessagePortapi.MessageChannelapi.MessageChannel.MessageChannelapi.MessageChannel.port1api.MessageChannel.port2api.MessageEvent.portsapi.MessagePortapi.MessagePort.closeapi.MessagePort.message_eventapi.MessagePort.postMessageapi.MessagePort.startapi.MessagePort.worker_supporthttps://nowyoucanuse.com/features--channel-messaging.html