third_party/WebKit/Source/core/frame/WindowEventHandlers.idl

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// https://html.spec.whatwg.org/multipage/webappapis.html#windoweventhandlers

[
    ImplementedAs=DOMWindowEventHandlers,
    LegacyTreatAsPartialInterface,
    NoInterfaceObject, // Always used on target of 'implements'
] interface WindowEventHandlers {
    //attribute EventHandler onafterprint;
    //attribute EventHandler onbeforeprint;
    // FIXME: onbeforeunload should be an OnBeforeUnloadEventHandler.
    attribute EventHandler onbeforeunload;
    attribute EventHandler onhashchange;
    attribute EventHandler onlanguagechange;
    attribute EventHandler onmessage;
    attribute EventHandler onoffline;
    attribute EventHandler ononline;
    attribute EventHandler onpagehide;
    attribute EventHandler onpageshow;
    attribute EventHandler onpopstate;
    attribute EventHandler onstorage;
    attribute EventHandler onunload;

    // Unhandled Promise Rejection Events
    // https://github.com/domenic/unhandled-rejections-browser-spec
    [RuntimeEnabled=PromiseRejectionEvent] attribute EventHandler onrejectionhandled;
    [RuntimeEnabled=PromiseRejectionEvent] attribute EventHandler onunhandledrejection;
};