在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

duration property of the dictionary EffectTiming 在 Web 动画 API specifies the duration in milliseconds that a single iteration (from beginning to end) the animation should take to complete.

Element.animate() , KeyframeEffectReadOnly() ，和 KeyframeEffect() all accept an object of timing properties including duration . The value of duration corresponds directly to AnimationEffectTimingReadOnly.duration in timing objects returned by AnimationEffectReadOnly , KeyframeEffectReadOnly ，和 KeyframeEffect .

句法

var timingProperties = {
  duration: durationInMilliseconds | "auto"
};
timingProperties.duration = durationInMilliseconds | "auto";
					

值

The number of milliseconds long a single beginning-to-end iteration of the animation should take. The default is "auto" . This value must not be negative; otherwise, it can have any value (including positive infinity).

Currently, a value of "auto" is the same as specifying 0.0. This is a forwards-compatiblity measure since in the future, "auto" will be expanded to take into account the duration of any child effects. Consider using "auto" rather than 0 if that makes sense.

异常

TypeError

The specified value is either a string other than "auto" , a number less than zero, NaN , or some other type of object entirely.

范例

在 Pool of Tears example, each tear is passed a random duration via its timing object:

// Randomizer function
var getRandomMsRange = function(min, max) {
  return Math.random() * (max - min) + min;
}
// Loop through each tear
tears.forEach(function(el) {
  // Animate each tear
  el.animate(
    tearsFalling,
    {
       delay: getRandomMsRange(-1000, 1000), // randomized for each tear
       duration: getRandomMsRange(2000, 6000), // randomized for each tear
       iterations: Infinity,
       easing: "cubic-bezier(0.6, 0.04, 0.98, 0.335)"
    });
});
					

规范

规范	状态	注释
Web 动画 The definition of 'duration' in that specification.	工作草案	编者草案。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
duration	Chrome 52	Edge ≤79	Firefox 63	IE No	Opera Yes	Safari No	WebView Android 52	Chrome Android 52	Firefox Android 63	Opera Android No	Safari iOS No	Samsung Internet Android Yes

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

另请参阅

• Web 动画 API
• Element.animate() , KeyframeEffectReadOnly() ，和 KeyframeEffect() all accept an object of timing properties including this one.
• The value of this property corresponds to property of the same name in AnimationEffectReadOnly.timing , KeyframeEffectReadOnly.timing ，和 KeyframeEffect.timing ).
• CSS's transition-duration and animation-duration properties

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. Web 动画 API
2. EffectTiming
3. 特性

   1. delay
   2. direction
   3. duration
   4. easing
   5. endDelay
   6. fill
   7. iterations
   8. iterationStart
4. Web 动画相关页面

   1. 动画
   2. AnimationEffect
   3. AnimationEvent
   4. AnimationPlaybackEvent
   5. AnimationTimeline
   6. Document.getAnimations()
   7. Document.timeline
   8. DocumentTimeline
   9. Element.animate()
   10. KeyframeEffect