element ui日期选择器小于当前日期不可选

<el-date-picker
      @change="chaeckValue"
      v-model="updateTime"
      value-format="yyyy-MM-dd"
      type="date"
      placeholder="选择日期"
      :picker-options="pickerOptions"
      >
    </el-date-picker>

data() {
    return {
      pickerOptions: {
                    disabledDate(time) {
                        return time.getTime() > Date.now();
                    }
      }
}