EffectTiming

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这是一个实验中的功能
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The EffectTiming dictionary, part of the Web Animations API, is used by Element.animate(), KeyframeEffectReadOnly(), and KeyframeEffect() to describe timing properties for animation effects. These properties are all optional, although without setting a duration the animation will not play.

Simply put, these properties describe how the user agent should go about making the transition from keyframe to keyframe, and how to behave when the animation begins and ends.

Properties

delay 可选
The number of milliseconds to delay the start of the animation. Defaults to 0.
direction 可选
Whether the animation runs forwards (normal), backwards (reverse), switches direction after each iteration (alternate), or runs backwards and switches direction after each iteration (alternate-reverse). Defaults to "normal".
duration 可选
The number of milliseconds each iteration of the animation takes to complete. Defaults to 0. Although this is technically optional, keep in mind that your animation will not run if this value is 0.
easing 可选
The rate of the animation's change over time. Accepts the pre-defined values "linear", "ease", "ease-in", "ease-out", and "ease-in-out", or a custom "cubic-bezier" value like "cubic-bezier(0.42, 0, 0.58, 1)". Defaults to "linear".
endDelay 可选
The number of milliseconds to delay after the end of an animation. This is primarily of use when sequencing animations based on the end time of another animation. Defaults to 0. 
fill 可选
Dictates whether the animation's effects should be reflected by the element(s) prior to playing ("backwards"), retained after the animation has completed playing ("forwards"), or both. Defaults to "none".
iterationStart 可选
Describes at what point in the iteration the animation should start. 0.5 would indicate starting halfway through the first iteration for example, and with this value set, an animation with 2 iterations would end halfway through a third iteration. Defaults to 0.0.
iterations 可选
The number of times the animation should repeat. Defaults to 1, and can also take a value of Infinity to make it repeat for as long as the element exists.

Specifications

Specification Status Comment
Web Animations
EffectTiming
Working Draft Initial definition

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
EffectTiming
Experimental
Chrome Full support 67
Full support 67
No support 52 — 67
Alternate Name
Alternate Name Uses the non-standard name: AnimationEffectTimingProperties
Edge Full support ≤79Firefox Full support 63IE ? Opera Full support YesSafari ? WebView Android Full support 67
Full support 67
No support 52 — 67
Alternate Name
Alternate Name Uses the non-standard name: AnimationEffectTimingProperties
Chrome Android Full support 67
Full support 67
No support 52 — 67
Alternate Name
Alternate Name Uses the non-standard name: AnimationEffectTimingProperties
Firefox Android Full support 63Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes
delay
Experimental
Chrome Full support 52Edge Full support ≤79Firefox Full support 63IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 52Chrome Android Full support 52Firefox Android Full support 63Opera Android No support NoSafari iOS No support NoSamsung Internet Android Full support Yes
direction
Experimental
Chrome Full support 52Edge Full support ≤79Firefox Full support 63IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 52Chrome Android Full support 52Firefox Android Full support 63Opera Android No support NoSafari iOS No support NoSamsung Internet Android Full support Yes
duration
Experimental
Chrome Full support 52Edge Full support ≤79Firefox Full support 63IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 52Chrome Android Full support 52Firefox Android Full support 63Opera Android No support NoSafari iOS No support NoSamsung Internet Android Full support Yes
easing
Experimental
Chrome Full support 52Edge Full support ≤79Firefox Full support 63IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 52Chrome Android Full support 52Firefox Android Full support 63Opera Android Full support YesSafari iOS No support NoSamsung Internet Android Full support Yes
endDelay
Experimental
Chrome Full support 52Edge Full support 79Firefox Full support 63IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 52Chrome Android Full support 52Firefox Android Full support 63Opera Android No support NoSafari iOS No support NoSamsung Internet Android Full support Yes
fill
Experimental
Chrome Full support 52Edge Full support 79Firefox Full support 63IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 52Chrome Android Full support 52Firefox Android Full support 63Opera Android No support NoSafari iOS No support NoSamsung Internet Android Full support Yes
iterations
Experimental
Chrome Full support 52Edge Full support ≤79Firefox Full support 63IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 52Chrome Android Full support 52Firefox Android Full support 63Opera Android No support NoSafari iOS No support NoSamsung Internet Android Full support Yes
iterationStart
Experimental
Chrome Full support 52Edge Full support ≤79Firefox Full support 63IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 52Chrome Android Full support 52Firefox Android Full support 63Opera Android No support NoSafari iOS No support NoSamsung Internet Android Full support Yes

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
Uses a non-standard name.
Uses a non-standard name.

See also