Properties
Optional onComplete
onComplete: undefined | ((target?: undefined | object) => void)
Optional onStart
onStart: undefined | ((target?: undefined | object) => void)
Optional onUpdate
onUpdate: undefined | ((target?: undefined | object, ratio?: undefined | number) => void)
Optional progress
progress: undefined | ((start: number, end: number, current: number, ratio: number) => number)
缓动的可选属性的接口定义。