Iterations

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The iterations property of the Web Animations API the number of times the animation should repeat. It defaults to 1, and can also take a value of Infinity to make it loop infinitely.

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

Syntax

// Set the animation to run twice
var timingProperties = {
  iterations: 2
}

Value

A whole number or decimal greater than or equal to 0, or Infinity. Defaults to 0.

Examples

In the Forgotten Key example, Alice waves her arm up and down infinitely by passing Infinity as the value for her iterations property:

// Get Alice's arm, and wave it up and down
document.getElementById("alice_arm").animate([ 
  { transform: 'rotate(10deg)' }, 
  { transform: 'rotate(-40deg)' }
], {
  easing: 'steps(2, end)',
  iterations: Infinity,
  direction: 'alternate',
  duration: 600
});

Specifications

Specification	Status	Comment
Web Animations The definition of 'iterations' in that specification.	Working Draft	Editor's draft.

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	(Yes)	48 (48)	No support	(Yes)	No support

Feature	Android	Android Webview	Chrome for Android	Firefox Mobile (Gecko)	Firefox OS	IE Mobile	Opera Mobile	Safari Mobile
Basic support	?	?	?	?	?	No support	No support	No support

Iterations

Syntax

Value

Examples

Specifications

Browser compatibility

See also

Document Tags and Contributors