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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 © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
* liability, trademark and document use rules apply.
enum IterationCompositeOperation {
dictionary KeyframeEffectOptions : EffectTiming {
IterationCompositeOperation iterationComposite = "replace";
CompositeOperation composite = "replace";
DOMString? pseudoElement = null;
// KeyframeEffect should run in the caller's compartment to do custom
// processing on the `keyframes` object.
[RunConstructorInCallerCompartment, Exposed=Window]
interface KeyframeEffect : AnimationEffect {
constructor(Element? target,
object? keyframes,
optional (unrestricted double or KeyframeEffectOptions) options = {});
constructor(KeyframeEffect source);
attribute Element? target;
[SetterThrows] attribute DOMString? pseudoElement;
attribute IterationCompositeOperation iterationComposite;
attribute CompositeOperation composite;
[Throws] sequence<object> getKeyframes();
[Throws] undefined setKeyframes(object? keyframes);
// Non-standard extensions
dictionary AnimationPropertyValueDetails {
required double offset;
UTF8String value;
UTF8String easing;
required CompositeOperation composite;
dictionary AnimationPropertyDetails {
required DOMString property;
required boolean runningOnCompositor;
DOMString warning;
required sequence<AnimationPropertyValueDetails> values;
partial interface KeyframeEffect {
[ChromeOnly, Throws] sequence<AnimationPropertyDetails> getProperties();