{
  "api": {
    "MessagePort": {
      "__compat": {
        "mdn_url": "https://developer.mozilla.org/docs/Web/API/MessagePort",
        "spec_url": "https://html.spec.whatwg.org/multipage/web-messaging.html#message-ports",
        "tags": [
          "web-features:channel-messaging"
        ],
        "support": {
          "chrome": {
            "version_added": "2"
          },
          "chrome_android": "mirror",
          "deno": {
            "version_added": "1.12"
          },
          "edge": {
            "version_added": "12"
          },
          "firefox": {
            "version_added": "41"
          },
          "firefox_android": "mirror",
          "ie": {
            "version_added": "10"
          },
          "nodejs": [
            {
              "version_added": "15.0.0"
            },
            {
              "version_added": "14.7.0",
              "partial_implementation": true,
              "notes": "Available as a part of the `worker_threads` module."
            },
            {
              "version_added": "11.7.0",
              "version_removed": "14.7.0",
              "partial_implementation": true,
              "notes": [
                "Available as a part of the `worker_threads` module.",
                "Inherits from Node `EventEmitter` instead of DOM `EventTarget`."
              ]
            }
          ],
          "oculus": "mirror",
          "opera": {
            "version_added": "10.6"
          },
          "opera_android": {
            "version_added": "11"
          },
          "safari": {
            "version_added": "5"
          },
          "safari_ios": "mirror",
          "samsunginternet_android": "mirror",
          "webview_android": "mirror",
          "webview_ios": "mirror"
        },
        "status": {
          "experimental": false,
          "standard_track": true,
          "deprecated": false
        }
      },
      "worker_support": {
        "__compat": {
          "description": "Available in workers",
          "support": {
            "chrome": {
              "version_added": "4"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.12"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "41"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "nodejs": {
              "version_added": "11.7.0"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "≤15"
            },
            "opera_android": {
              "version_added": "≤14"
            },
            "safari": {
              "version_added": "5"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "≤37"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "close": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/MessagePort/close",
          "spec_url": "https://html.spec.whatwg.org/multipage/web-messaging.html#dom-messageport-close-dev",
          "tags": [
            "web-features:channel-messaging"
          ],
          "support": {
            "chrome": {
              "version_added": "2"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.12"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "41"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "nodejs": {
              "version_added": "11.7.0"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "10.6"
            },
            "opera_android": {
              "version_added": "11"
            },
            "safari": {
              "version_added": "5"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "message_event": {
        "__compat": {
          "description": "`message` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/MessagePort/message_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-message",
            "https://html.spec.whatwg.org/multipage/web-messaging.html#handler-messageport-onmessage"
          ],
          "tags": [
            "web-features:channel-messaging"
          ],
          "support": {
            "chrome": {
              "version_added": "2"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.12"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "41"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "nodejs": [
              {
                "version_added": "14.7.0"
              },
              {
                "version_added": "11.7.0",
                "version_removed": "14.7.0",
                "partial_implementation": true,
                "notes": "Supports the event, but only via Node `EventEmitter`."
              }
            ],
            "oculus": "mirror",
            "opera": {
              "version_added": "10.6"
            },
            "opera_android": {
              "version_added": "11.5"
            },
            "safari": {
              "version_added": "5"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "≤37"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "messageerror_event": {
        "__compat": {
          "description": "`messageerror` event",
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/MessagePort/messageerror_event",
          "spec_url": [
            "https://html.spec.whatwg.org/multipage/indices.html#event-messageerror",
            "https://html.spec.whatwg.org/multipage/web-messaging.html#handler-messageport-onmessageerror"
          ],
          "tags": [
            "web-features:messageerror"
          ],
          "support": {
            "chrome": {
              "version_added": "60"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.12"
            },
            "edge": {
              "version_added": "18"
            },
            "firefox": {
              "version_added": "57"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": false
            },
            "nodejs": [
              {
                "version_added": "14.7.0"
              },
              {
                "version_added": "14.5.0",
                "version_removed": "14.7.0",
                "partial_implementation": true,
                "notes": "Supports the event, but only via Node `EventEmitter`."
              },
              {
                "version_added": "12.19.0",
                "version_removed": "13.0.0",
                "partial_implementation": true,
                "notes": "Supports the event, but only via Node `EventEmitter`."
              }
            ],
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": {
              "version_added": "47"
            },
            "safari": {
              "version_added": "16.4"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "postMessage": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/MessagePort/postMessage",
          "spec_url": "https://html.spec.whatwg.org/multipage/web-messaging.html#dom-messageport-postmessage-dev",
          "tags": [
            "web-features:channel-messaging"
          ],
          "support": {
            "chrome": {
              "version_added": "2"
            },
            "chrome_android": "mirror",
            "deno": [
              {
                "version_added": "1.14",
                "notes": "The `message` parameter does not support cloning `Blob` values."
              },
              {
                "version_added": "1.12",
                "version_removed": "1.14",
                "partial_implementation": true,
                "notes": [
                  "The `message` parameter does not support cloning `Blob` values.",
                  "The `transfer` parameter does not accept `ArrayBuffer` items. Passing an `ArrayBuffer` results in an error being thrown."
                ]
              }
            ],
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "41"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "nodejs": {
              "version_added": "11.7.0"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "10.6"
            },
            "opera_android": {
              "version_added": "11"
            },
            "safari": {
              "version_added": "5"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "options_includeUserActivation_parameter": {
          "__compat": {
            "description": "`options.includeUserActivation` parameter",
            "support": {
              "chrome": {
                "version_added": "72"
              },
              "chrome_android": "mirror",
              "deno": {
                "version_added": false
              },
              "edge": "mirror",
              "firefox": {
                "version_added": false
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": false
              },
              "nodejs": {
                "version_added": false
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": false
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": false
            }
          }
        }
      },
      "start": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/MessagePort/start",
          "spec_url": "https://html.spec.whatwg.org/multipage/web-messaging.html#dom-messageport-start-dev",
          "tags": [
            "web-features:channel-messaging"
          ],
          "support": {
            "chrome": {
              "version_added": "2"
            },
            "chrome_android": "mirror",
            "deno": {
              "version_added": "1.12"
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "41"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "10"
            },
            "nodejs": {
              "version_added": "11.7.0"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "10.6"
            },
            "opera_android": {
              "version_added": "11"
            },
            "safari": {
              "version_added": "5"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}