{
  "api": {
    "WindowEventHandlers": {
      "__compat": {
        "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers",
        "support": {
          "chrome": {
            "version_added": true
          },
          "chrome_android": {
            "version_added": true
          },
          "edge": {
            "version_added": null
          },
          "edge_mobile": {
            "version_added": null
          },
          "firefox": {
            "version_added": true
          },
          "firefox_android": {
            "version_added": true
          },
          "ie": {
            "version_added": null
          },
          "opera": {
            "version_added": true
          },
          "opera_android": {
            "version_added": true
          },
          "safari": {
            "version_added": null
          },
          "safari_ios": {
            "version_added": null
          },
          "webview_android": {
            "version_added": true
          }
        },
        "status": {
          "experimental": false,
          "standard_track": true,
          "deprecated": false
        }
      },
      "onafterprint": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onafterprint",
          "support": {
            "chrome": {
              "version_added": "63"
            },
            "chrome_android": {
              "version_added": "63"
            },
            "edge": {
              "version_added": true
            },
            "edge_mobile": {
              "version_added": true
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": {
              "version_added": null
            },
            "ie": {
              "version_added": true
            },
            "opera": {
              "version_added": "50"
            },
            "opera_android": {
              "version_added": "50"
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": null
            },
            "webview_android": {
              "version_added": "63"
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "onbeforeprint": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onbeforeprint",
          "support": {
            "chrome": {
              "version_added": "63"
            },
            "chrome_android": {
              "version_added": "63"
            },
            "edge": {
              "version_added": true
            },
            "edge_mobile": {
              "version_added": true
            },
            "firefox": {
              "version_added": "6"
            },
            "firefox_android": {
              "version_added": null
            },
            "ie": {
              "version_added": true
            },
            "opera": {
              "version_added": "50"
            },
            "opera_android": {
              "version_added": "50"
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": null
            },
            "webview_android": {
              "version_added": "63"
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "onbeforeunload": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onbeforeunload",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": {
              "version_added": true
            },
            "edge": {
              "version_added": true
            },
            "edge_mobile": {
              "version_added": true
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": {
              "version_added": null
            },
            "ie": {
              "version_added": "4"
            },
            "opera": {
              "version_added": "12"
            },
            "opera_android": {
              "version_added": true
            },
            "safari": {
              "version_added": "3"
            },
            "safari_ios": {
              "version_added": false,
              "notes": "Implementation seems <a href='https://bugs.webkit.org/show_bug.cgi?id=19324'>defect</a>."
            },
            "webview_android": {
              "version_added": true
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "custom_text_support": {
          "__compat": {
            "description": "Custom text support",
            "support": {
              "chrome": {
                "version_added": true,
                "version_removed": "51"
              },
              "chrome_android": {
                "version_added": true,
                "version_removed": "51"
              },
              "edge": {
                "version_added": false
              },
              "edge_mobile": {
                "version_added": false
              },
              "firefox": {
                "version_added": true,
                "version_removed": "44"
              },
              "firefox_android": {
                "version_added": true,
                "version_removed": "44"
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true,
                "version_removed": "38"
              },
              "opera_android": {
                "version_added": true,
                "version_removed": "38"
              },
              "safari": {
                "version_added": true,
                "version_removed": "9"
              },
              "safari_ios": {
                "version_added": null
              },
              "webview_android": {
                "version_added": true,
                "version_removed": "51"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        }
      },
      "onhashchange": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onhashchange",
          "support": {
            "chrome": {
              "version_added": "5"
            },
            "chrome_android": {
              "version_added": true
            },
            "edge": {
              "version_added": true
            },
            "edge_mobile": {
              "version_added": true
            },
            "firefox": {
              "version_added": "3.6"
            },
            "firefox_android": {
              "version_added": "4"
            },
            "ie": {
              "version_added": "8"
            },
            "opera": {
              "version_added": "10"
            },
            "opera_android": {
              "version_added": "11"
            },
            "safari": {
              "version_added": "5"
            },
            "safari_ios": {
              "version_added": "5"
            },
            "webview_android": {
              "version_added": true
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "onlanguagechange": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onlanguagechange",
          "support": {
            "chrome": {
              "version_added": "37"
            },
            "chrome_android": {
              "version_added": "37"
            },
            "edge": {
              "version_added": null
            },
            "edge_mobile": {
              "version_added": null
            },
            "firefox": {
              "version_added": "32"
            },
            "firefox_android": {
              "version_added": "4"
            },
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": "24"
            },
            "opera_android": {
              "version_added": "24"
            },
            "safari": {
              "version_added": null
            },
            "safari_ios": {
              "version_added": null
            },
            "webview_android": {
              "version_added": "37"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "onmessage": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onmessage",
          "support": {
            "chrome": {
              "version_added": "60"
            },
            "chrome_android": {
              "version_added": "60"
            },
            "edge": {
              "version_added": null
            },
            "edge_mobile": {
              "version_added": null
            },
            "firefox": {
              "version_added": null
            },
            "firefox_android": {
              "version_added": null
            },
            "ie": {
              "version_added": null
            },
            "opera": {
              "version_added": "47"
            },
            "opera_android": {
              "version_added": "47"
            },
            "safari": {
              "version_added": null
            },
            "safari_ios": {
              "version_added": null
            },
            "webview_android": {
              "version_added": "60"
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "onmessageerror": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onmessageerror",
          "support": {
            "chrome": {
              "version_added": "60"
            },
            "chrome_android": {
              "version_added": "60"
            },
            "edge": {
              "version_added": null
            },
            "edge_mobile": {
              "version_added": null
            },
            "firefox": {
              "version_added": "57"
            },
            "firefox_android": {
              "version_added": "57"
            },
            "ie": {
              "version_added": null
            },
            "opera": {
              "version_added": "47"
            },
            "opera_android": {
              "version_added": "47"
            },
            "safari": {
              "version_added": null
            },
            "safari_ios": {
              "version_added": null
            },
            "webview_android": {
              "version_added": "60"
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "worker_support": {
          "__compat": {
            "description": "Available in workers",
            "support": {
              "chrome": {
                "version_added": "60"
              },
              "chrome_android": {
                "version_added": "60"
              },
              "edge": {
                "version_added": null
              },
              "edge_mobile": {
                "version_added": null
              },
              "firefox": {
                "version_added": "57"
              },
              "firefox_android": {
                "version_added": "57"
              },
              "ie": {
                "version_added": null
              },
              "opera": {
                "version_added": "47"
              },
              "opera_android": {
                "version_added": "47"
              },
              "safari": {
                "version_added": null
              },
              "safari_ios": {
                "version_added": null
              },
              "webview_android": {
                "version_added": "60"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "onpopstate": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onpopstate",
          "support": {
            "chrome": {
              "version_added": "5"
            },
            "chrome_android": {
              "version_added": "18"
            },
            "edge": {
              "version_added": "12"
            },
            "edge_mobile": {
              "version_added": null
            },
            "firefox": {
              "version_added": "4"
            },
            "firefox_android": {
              "version_added": "4"
            },
            "ie": {
              "version_added": "10"
            },
            "opera": {
              "version_added": "11.5"
            },
            "opera_android": {
              "version_added": "12"
            },
            "safari": {
              "version_added": "6"
            },
            "safari_ios": {
              "version_added": "5.1"
            },
            "webview_android": {
              "version_added": null
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "onrejectionhandled": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onrejectionhandled",
          "support": {
            "chrome": {
              "version_added": "49"
            },
            "chrome_android": {
              "version_added": false
            },
            "edge": {
              "version_added": null
            },
            "edge_mobile": {
              "version_added": null
            },
            "firefox": {
              "version_added": false,
              "notes": "Firefox implements the <code>PromiseRejectionEvent</code> interface if you go to about:config and set the <code>dom.promise_rejection_events.enabled</code> pref to <code>true</code>. However, Firefox doesn't yet actually send the <code>unhandledrejection</code> or understand <code>rejectionhandled</code> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
            },
            "firefox_android": {
              "version_added": false,
              "notes": "Firefox implements the <code>PromiseRejectionEvent</code> interface if you go to about:config and set the <code>dom.promise_rejection_events.enabled</code> pref to <code>true</code>. However, Firefox doesn't yet actually send the <code>unhandledrejection</code> or understand <code>rejectionhandled</code> 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
            },
            "webview_android": {
              "version_added": false
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "onstorage": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onstorage",
          "support": {
            "chrome": {
              "version_added": null
            },
            "chrome_android": {
              "version_added": false
            },
            "edge": {
              "version_added": true
            },
            "edge_mobile": {
              "version_added": true
            },
            "firefox": {
              "version_added": "45"
            },
            "firefox_android": {
              "version_added": "45"
            },
            "ie": {
              "version_added": null
            },
            "opera": {
              "version_added": null
            },
            "opera_android": {
              "version_added": null
            },
            "safari": {
              "version_added": null
            },
            "safari_ios": {
              "version_added": null
            },
            "webview_android": {
              "version_added": false
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "onunhandledrejection": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onunhandledrejection",
          "support": {
            "chrome": {
              "version_added": "49"
            },
            "chrome_android": {
              "version_added": false
            },
            "edge": {
              "version_added": true
            },
            "edge_mobile": {
              "version_added": true
            },
            "firefox": {
              "version_added": false,
              "notes": "Firefox implements the <code>PromiseRejectionEvent</code> interface if you go to about:config and set the <code>dom.promise_rejection_events.enabled</code> pref to <code>true</code>. However, Firefox doesn't yet actually send the <code>unhandledrejection</code> or understand <code>rejectionhandled</code> events. Completing the implementation will be addressed in <a href='https://bugzil.la/1362272'>bug 1362272</a>."
            },
            "firefox_android": {
              "version_added": false,
              "notes": "Firefox implements the <code>PromiseRejectionEvent</code> interface if you go to about:config and set the <code>dom.promise_rejection_events.enabled</code> pref to <code>true</code>. However, Firefox doesn't yet actually send the <code>unhandledrejection</code> or understand <code>rejectionhandled</code> 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
            },
            "webview_android": {
              "version_added": false
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "onunload": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/WindowEventHandlers/onunload",
          "support": {
            "chrome": {
              "version_added": true
            },
            "chrome_android": {
              "version_added": true
            },
            "edge": {
              "version_added": true
            },
            "edge_mobile": {
              "version_added": true
            },
            "firefox": {
              "version_added": true
            },
            "firefox_android": {
              "version_added": true
            },
            "ie": {
              "version_added": true
            },
            "opera": {
              "version_added": true
            },
            "opera_android": {
              "version_added": true
            },
            "safari": {
              "version_added": true
            },
            "safari_ios": {
              "version_added": true
            },
            "webview_android": {
              "version_added": true
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}