{
  "api": {
    "PromiseRejectionEvent": {
      "__compat": {
        "mdn_url": "https://developer.mozilla.org/docs/Web/API/PromiseRejectionEvent",
        "support": {
          "chrome": {
            "version_added": "49"
          },
          "chrome_android": {
            "version_added": false
          },
          "edge": {
            "version_added": null
          },
          "edge_mobile": {
            "version_added": null
          },
          "firefox": {
            "version_added": false,
            "flags": [
              {
                "type": "preference",
                "name": "dom.promise_rejection_events.enabled",
                "value_to_set": "true"
              }
            ],
            "notes": "Firefox doesn't yet send the <a href='https://developer.mozilla.org/docs/Web/Events/unhandledrejection'>unhandledrejection</a> or understand <a href='https://developer.mozilla.org/docs/Web/Events/rejectionhandled'>rejectionhandled<a> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
          },
          "firefox_android": {
            "version_added": false,
            "flags": [
              {
                "type": "preference",
                "name": "dom.promise_rejection_events.enabled",
                "value_to_set": "true"
              }
            ],
            "notes": "Firefox doesn't yet send the <a href='https://developer.mozilla.org/docs/Web/Events/unhandledrejection'>unhandledrejection</a> or understand <a href='https://developer.mozilla.org/docs/Web/Events/rejectionhandled'>rejectionhandled<a> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
          },
          "ie": {
            "version_added": false
          },
          "opera": {
            "version_added": false
          },
          "opera_android": {
            "version_added": false
          },
          "safari": {
            "version_added": false
          },
          "safari_ios": {
            "version_added": false
          },
          "samsunginternet_android": {
            "version_added": null
          },
          "webview_android": {
            "version_added": null
          }
        },
        "status": {
          "experimental": false,
          "standard_track": true,
          "deprecated": false
        }
      },
      "PromiseRejectionEvent": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/PromiseRejectionEvent/PromiseRejectionEvent",
          "support": {
            "chrome": {
              "version_added": "49"
            },
            "chrome_android": {
              "version_added": false
            },
            "edge": {
              "version_added": null
            },
            "edge_mobile": {
              "version_added": null
            },
            "firefox": {
              "version_added": false,
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.promise_rejection_events.enabled",
                  "value_to_set": "true"
                }
              ],
              "notes": "Firefox doesn't yet send the <a href='https://developer.mozilla.org/docs/Web/Events/unhandledrejection'>unhandledrejection</a> or understand <a href='https://developer.mozilla.org/docs/Web/Events/rejectionhandled'>rejectionhandled<a> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
            },
            "firefox_android": {
              "version_added": false,
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.promise_rejection_events.enabled",
                  "value_to_set": "true"
                }
              ],
              "notes": "Firefox doesn't yet send the <a href='https://developer.mozilla.org/docs/Web/Events/unhandledrejection'>unhandledrejection</a> or understand <a href='https://developer.mozilla.org/docs/Web/Events/rejectionhandled'>rejectionhandled<a> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
            },
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": false
            },
            "opera_android": {
              "version_added": false
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": null
            },
            "webview_android": {
              "version_added": null
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "promise": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/PromiseRejectionEvent/promise",
          "support": {
            "chrome": {
              "version_added": "49"
            },
            "chrome_android": {
              "version_added": false
            },
            "edge": {
              "version_added": null
            },
            "edge_mobile": {
              "version_added": null
            },
            "firefox": {
              "version_added": false,
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.promise_rejection_events.enabled",
                  "value_to_set": "true"
                }
              ],
              "notes": "Firefox doesn't yet send the <a href='https://developer.mozilla.org/docs/Web/Events/unhandledrejection'>unhandledrejection</a> or understand <a href='https://developer.mozilla.org/docs/Web/Events/rejectionhandled'>rejectionhandled<a> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
            },
            "firefox_android": {
              "version_added": false,
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.promise_rejection_events.enabled",
                  "value_to_set": "true"
                }
              ],
              "notes": "Firefox doesn't yet send the <a href='https://developer.mozilla.org/docs/Web/Events/unhandledrejection'>unhandledrejection</a> or understand <a href='https://developer.mozilla.org/docs/Web/Events/rejectionhandled'>rejectionhandled<a> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
            },
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": false
            },
            "opera_android": {
              "version_added": false
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": null
            },
            "webview_android": {
              "version_added": null
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "reason": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/PromiseRejectionEvent/reason",
          "support": {
            "chrome": {
              "version_added": "49"
            },
            "chrome_android": {
              "version_added": false
            },
            "edge": {
              "version_added": null
            },
            "edge_mobile": {
              "version_added": null
            },
            "firefox": {
              "version_added": false,
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.promise_rejection_events.enabled",
                  "value_to_set": "true"
                }
              ],
              "notes": "Firefox doesn't yet send the <a href='https://developer.mozilla.org/docs/Web/Events/unhandledrejection'>unhandledrejection</a> or understand <a href='https://developer.mozilla.org/docs/Web/Events/rejectionhandled'>rejectionhandled<a> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
            },
            "firefox_android": {
              "version_added": false,
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.promise_rejection_events.enabled",
                  "value_to_set": "true"
                }
              ],
              "notes": "Firefox doesn't yet send the <a href='https://developer.mozilla.org/docs/Web/Events/unhandledrejection'>unhandledrejection</a> or understand <a href='https://developer.mozilla.org/docs/Web/Events/rejectionhandled'>rejectionhandled<a> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
            },
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": false
            },
            "opera_android": {
              "version_added": false
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": null
            },
            "webview_android": {
              "version_added": null
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}