<slot v-bind="{ d: days, h: hours, m: mins, s: seconds, hh: `00${hours}`.slice(-2), mm: `00${mins}`.slice(-2), ss: `00${seconds}`.slice(-2), }"></slot>
00${hours}.slice(-2) 不用判断,先补上0再说,然后再从后面往前截取两位。
00${hours}