Jekyll2026-05-24T01:11:00+00:00https://rixx.github.io/baseline-updates/feed/by_tag/messaging.xmlBaseline UpdatesUpdates to the Baseline collection. Including RSS feeds (both for all updates and individual tags).New in High Baseline Support: messageerror2025-09-27T00:00:00+00:002025-09-27T00:00:00+00:00https://rixx.github.io/baseline-updates/2025/09/27/messageerrorcaniuse · mdn · [spec]([‘https://html.spec.whatwg.org/multipage/indices.html#event-messageerror’, ‘https://w3c.github.io/ServiceWorker/#eventdef-serviceworkerglobalscope-messageerror’])

The messageerror event fires on a target, such as a window or worker, when an incoming message cannot be deserialized. This event can fire for many types of messages, such as cross-document messages or broadcast channel messages.

Source features

  • api.DedicatedWorkerGlobalScope.messageerror_event [mdn]
  • api.MessagePort.messageerror_event [mdn]
  • api.Window.messageerror_event [mdn]
  • api.ServiceWorkerContainer.messageerror_event [mdn]
  • api.ServiceWorkerGlobalScope.messageerror_event [mdn]
  • api.Worker.messageerror_event [mdn]
]]>New in High Baseline Support: Server-sent events2022-07-15T00:00:00+00:002022-07-15T00:00:00+00:00https://rixx.github.io/baseline-updates/2022/07/15/server-sent-eventscaniuse · mdn · spec

The EventSource API creates a connection to a server and listens to a stream of events sent by the server.

Source features

  • api.EventSource [mdn]
  • api.EventSource.EventSource [mdn]
  • api.EventSource.close [mdn]
  • api.EventSource.error_event [mdn]
  • api.EventSource.message_event [mdn]
  • api.EventSource.open_event [mdn]
  • api.EventSource.readyState [mdn]
  • api.EventSource.url [mdn]
  • api.EventSource.withCredentials [mdn]
]]>New in Low Baseline Support: Server-sent events2020-01-15T00:00:00+00:002020-01-15T00:00:00+00:00https://rixx.github.io/baseline-updates/2020/01/15/server-sent-eventscaniuse · mdn · spec

The EventSource API creates a connection to a server and listens to a stream of events sent by the server.

Source features

  • api.EventSource [mdn]
  • api.EventSource.EventSource [mdn]
  • api.EventSource.close [mdn]
  • api.EventSource.error_event [mdn]
  • api.EventSource.message_event [mdn]
  • api.EventSource.open_event [mdn]
  • api.EventSource.readyState [mdn]
  • api.EventSource.url [mdn]
  • api.EventSource.withCredentials [mdn]
]]>New in High Baseline Support: Channel messaging2018-03-22T00:00:00+00:002018-03-22T00:00:00+00:00https://rixx.github.io/baseline-updates/2018/03/22/channel-messagingcaniuse · mdn · spec

Channel messaging communicates one-to-one between browsing contexts on the same origin, such as between <iframe> elements or two documents using a shared worker.

Source features

  • api.MessageEvent.ports [mdn]
  • api.MessageChannel [mdn]
  • api.MessageChannel.MessageChannel [mdn]
  • api.MessageChannel.port1 [mdn]
  • api.MessageChannel.port2 [mdn]
  • api.MessagePort [mdn]
  • api.MessagePort.close [mdn]
  • api.MessagePort.message_event [mdn]
  • api.MessagePort.postMessage [mdn]
  • api.MessagePort.start [mdn]
]]>New in High Baseline Support: postMessage2018-01-29T00:00:00+00:002018-01-29T00:00:00+00:00https://rixx.github.io/baseline-updates/2018/01/29/postmessagecaniuse · mdn · spec

The postMessage() global method sends cross-origin messages to windows and workers, including popups and iframes. Also known as cross-document messaging.

Source features

  • api.MessageEvent [mdn]
  • api.MessageEvent.data [mdn]
  • api.MessageEvent.origin [mdn]
  • api.MessageEvent.source [mdn]
  • api.Window.postMessage [mdn]
  • api.Worker.postMessage [mdn]
  • api.DedicatedWorkerGlobalScope.message_event [mdn]
  • api.DedicatedWorkerGlobalScope.postMessage [mdn]
  • api.Worker.message_event [mdn]
  • api.MessageEvent.MessageEvent [mdn]
  • api.Window.message_event [mdn]
  • api.MessageEvent.lastEventId [mdn]
]]>New in Low Baseline Support: Channel messaging2015-09-22T00:00:00+00:002015-09-22T00:00:00+00:00https://rixx.github.io/baseline-updates/2015/09/22/channel-messagingcaniuse · mdn · spec

Channel messaging communicates one-to-one between browsing contexts on the same origin, such as between <iframe> elements or two documents using a shared worker.

Source features

  • api.MessageEvent.ports [mdn]
  • api.MessageChannel [mdn]
  • api.MessageChannel.MessageChannel [mdn]
  • api.MessageChannel.port1 [mdn]
  • api.MessageChannel.port2 [mdn]
  • api.MessagePort [mdn]
  • api.MessagePort.close [mdn]
  • api.MessagePort.message_event [mdn]
  • api.MessagePort.postMessage [mdn]
  • api.MessagePort.start [mdn]
]]>New in Low Baseline Support: postMessage2015-07-29T00:00:00+00:002015-07-29T00:00:00+00:00https://rixx.github.io/baseline-updates/2015/07/29/postmessagecaniuse · mdn · spec

The postMessage() global method sends cross-origin messages to windows and workers, including popups and iframes. Also known as cross-document messaging.

Source features

  • api.MessageEvent [mdn]
  • api.MessageEvent.data [mdn]
  • api.MessageEvent.origin [mdn]
  • api.MessageEvent.source [mdn]
  • api.Window.postMessage [mdn]
  • api.Worker.postMessage [mdn]
  • api.DedicatedWorkerGlobalScope.message_event [mdn]
  • api.DedicatedWorkerGlobalScope.postMessage [mdn]
  • api.Worker.message_event [mdn]
  • api.MessageEvent.MessageEvent [mdn]
  • api.Window.message_event [mdn]
  • api.MessageEvent.lastEventId [mdn]
]]>