CSS animation-duration

The CSS animation-duration property allows you to specify how long your animation will take to complete one cycle.

This allows you to adjust the speed of the animation, so that it runs quickly, slowly, or somewhere in between.

The animation-duration property accepts a "time" value. For example, a value of 3s will result in an animation running for 3 seconds. By changing the value of the animation-duration property, you effectively change the speed at which your animation runs. A higher value results in a slower animation, whereas a smaller value results in a faster animation.

Syntax

Possible Values

<time>

The period of time that the animation should take to complete one cycle. For example, a value of 5s would result in the animation taking 5 seconds to complete. By default the value is 0s, meaning that the animation cycle is immediate (i.e. you would not see any animation). A negative value is treated as 0s.

In addition, all CSS properties also accept the following CSS-wide keyword values as the sole component of their property value:

initial

Represents the value specified as the property's initial value.

inherit

Represents the computed value of the property on the element's parent.

unset

This value acts as either inherit or initial, depending on whether the property is inherited or not. In other words, it sets all properties to their parent value if they are inheritable or to their initial value if not inheritable.

Basic Property Information

Example Code

Basic CSS

Working Example within an HTML Document

CSS Specifications

• This property is defined in CSS Animations Level 1 (W3C Working Draft)

Browser Support

Browser support for CSS properties can vary, particularly for newer or experimental features. Check current browser compatibility before using a property in production, especially when supporting older browsers.

The following table provided by Caniuse.com shows the level of browser support for this feature.

Initial Value

CSS properties have an initial value that applies when the property has not been explicitly set. The initial value is different from the value inherited from a parent element and may vary between properties.

Inheritance

Some CSS properties inherit their computed value from their parent element by default, while others do not. The inherit, initial, unset, and revert keywords can also be used to control how a property gets its value.

Vendor Prefixes

Most modern CSS properties use the standard, unprefixed syntax. Vendor-prefixed properties such as -webkit- are mainly relevant to older browser versions or specific features and should only be used when required by your browser support targets.