ElementUI el-date-picker不可以選擇之前的時間

<el-date-picker v-model="time" type="date" placeholder="選擇日期" format="yyyy-MM-dd HH:mm:ss" value-format="yyyy-MM-dd HH:mm:ss"  :picker-options="expireTimeOption">

data(){
    return {
        expireTimeOption: {
        disabledDate(date) {
                return date.getTime() <= Date.now();
        }
        }
    }
}