CSS animation-fill-mode

The CSS animation-fill-mode property allows you to define what values are applied by the animation outside the time it is executing. This can be before the animation has been applied, or after it has finished running.

Syntax

Possible Values

none

Specifies that no styles will be applied to the element before or after the animation is executing.

forwards

Specifies that the animation will apply the property values defined in its last executing keyframe after the final iteration of the animation, until the animation style is removed.

backwards

Specifies that the animation will apply the property values defined in its 0% or from keyframe as soon as the animation is applied, during the period defined by animation-delay.

both

Specifies that the animation will follow the rules for both forwards and backwards (i.e. it will extend the animation properties in both directions).

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.