Properties
direction
direction: "unset" | "inherit" | "initial" | "normal" | "reverse" | "alternate" | "alternate-reverse"
fill-mode
fill-mode: "none" | "forwards" | "backwards" | "both"
iteration-count
iteration-count: number
play-state
play-state: "unset" | "inherit" | "initial" | "paused" | "running"
timing-function
timing-function: string