animation-fill-mode - CSS 3
The animation-fill-mode property specifies a style for the element when the animation is
not playing (when it is finished, or when it has a delay).By default, CSS animations do not affect the element until the first keyframe is "played", and then stops once the last keyframe has completed. The animation-fill-mode property can override this
behavior.
Syntax
animation-fill-mode: none|forwards|backwards|both|initial|inherit;
Example
div { -webkit-animation-fill-mode: forwards; /* Chrome, Safari, Opera */
animation-fill-mode: forwards;}
Output / Return Value
Limitations
Alternatives / See Also
Reference