{
  "info": {
    "name": "HTML",
    "subsection_number": "9.5",
    "subsection_name": "Channel Messaging",
    "url": "https://html.spec.whatwg.org/multipage/comms.html#channel-messaging"
  },
  "features": [
    "MessagePort.prototype.close",
    "MessagePort.prototype.postMessage",
    "MessagePort.prototype.start",
    "window.postMessage"
  ]
}