:is-date-disabled="dateDisabled"
   <n-date-picker
                      v-if="formData.timeEndActive"
                      type="date"
                      style="width: 100%"
                      placeholder="请选择任务结束时间"
                      value-format="yyyy-MM-dd 23:59:59"
                      :is-date-disabled="dateDisabled"
                      v-model:formatted-value="formData.scheduleEndTime"/>

const defaultDate = new Date()
const dateDisabled =(ts:any)=>{
   const today = new Date();
   today.setHours(0, 0, 0, 0);
   const todayTimestamp = today.getTime();
   const selectedDate = new Date(ts);
   const selectedTimestamp = selectedDate.getTime();
   return selectedTimestamp < todayTimestamp;
}

效果如下：