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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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
* The origin of this IDL file is
* Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
* liability, trademark and document use rules apply.
[Exposed=(Window,Worker,AudioWorklet), ProbablyShortLivingWrapper]
interface Event {
constructor(DOMString type, optional EventInit eventInitDict = {});
readonly attribute DOMString type;
[Pure, BindingAlias="srcElement"]
readonly attribute EventTarget? target;
readonly attribute EventTarget? currentTarget;
sequence<EventTarget> composedPath();
const unsigned short NONE = 0;
const unsigned short CAPTURING_PHASE = 1;
const unsigned short AT_TARGET = 2;
const unsigned short BUBBLING_PHASE = 3;
readonly attribute unsigned short eventPhase;
undefined stopPropagation();
undefined stopImmediatePropagation();
readonly attribute boolean bubbles;
readonly attribute boolean cancelable;
attribute boolean returnValue;
undefined preventDefault();
[Pure, NeedsCallerType]
readonly attribute boolean defaultPrevented;
[ChromeOnly, Pure]
readonly attribute boolean defaultPreventedByChrome;
[ChromeOnly, Pure]
readonly attribute boolean defaultPreventedByContent;
readonly attribute boolean composed;
[LegacyUnforgeable, Pure]
readonly attribute boolean isTrusted;
readonly attribute DOMHighResTimeStamp timeStamp;
undefined initEvent(DOMString type,
optional boolean bubbles = false,
optional boolean cancelable = false);
attribute boolean cancelBubble;
// Mozilla specific legacy stuff.
partial interface Event {
const long ALT_MASK = 0x00000001;
const long CONTROL_MASK = 0x00000002;
const long SHIFT_MASK = 0x00000004;
const long META_MASK = 0x00000008;
/** The original target of the event, before any retargetings. */
readonly attribute EventTarget? originalTarget;
* The explicit original target of the event. If the event was retargeted
* for some reason other than an anonymous boundary crossing, this will be set
* to the target before the retargeting occurs. For example, mouse events
* are retargeted to their parent node when they happen over text nodes (bug
* 185889), and in that case .target will show the parent and
* .explicitOriginalTarget will show the text node.
* .explicitOriginalTarget differs from .originalTarget in that it will never
* contain anonymous content.
readonly attribute EventTarget? explicitOriginalTarget;
[ChromeOnly] readonly attribute EventTarget? composedTarget;
[ChromeOnly] undefined preventMultipleActions();
[ChromeOnly] readonly attribute boolean multipleActionsPrevented;
[ChromeOnly] readonly attribute boolean isSynthesized;
* When the event target is a remote browser, calling this will fire an
* reply event in the chrome process.
[ChromeOnly] undefined requestReplyFromRemoteContent();
* Returns true when the event shouldn't be handled by chrome.
[ChromeOnly] readonly attribute boolean isWaitingReplyFromRemoteContent;
* Returns true when the event is a reply event from a remote process.
[ChromeOnly] readonly attribute boolean isReplyEventFromRemoteContent;
dictionary EventInit {
boolean bubbles = false;
boolean cancelable = false;
boolean composed = false;