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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
/*
* For more information on this interface please see
* https://html.spec.whatwg.org/multipage/#beforeunloadevent
*/
[Exposed=Window]
interface BeforeUnloadEvent : Event {
attribute DOMString returnValue;
};
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