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element: document.getElementById("myDIV").style.animationDuration="3s"; [Try it Yourself »](#) * * * ## Definition and Usage The animationDuration property defines the number of seconds an animation takes to complete one cycle. * * * ## Browser Support  Only Firefox supports the animationDuration property. * * * ## Syntax Return the animationDuration property: _object_.style.animationDuration Set the animationDuration property: _object_.style.animationDuration="_time_|initial|inherit" ## Property Values | Value | Description | | --- | --- | | _time_ | Specifies the length of the animation. Default value is 0, which means no animation. | | initial | Sets this property to its default value. Read about _initial_. | | inherit | Inherits this property from its parent element. Read about _inherit_. | ## Technical Details | Default Value: | 0 | | --- | | Return Value: | A string, representing the animation-duration property of an element. | | CSS Version | CSS3 | * * * ## Related Articles CSS Reference: (#) * * Style Object](#)