iview-select選擇器元件設定預設選中的值問題(親測解決)

fillList: [
        {
          value: 'default',
          label: '推薦預設'
        },
        {
          value: 'new',
          label: '新的'
        },
        {
          value: 'price_up',
          label: '價格高'
        },
        {
          value: 'price_down',
          label: '價格低'
        },
        {
          value: 'like',
          label: '點贊數'
        }
      ],      

<Select v-model="order"  value="default" placeholder="" @on-change="fllites">
                  <Option v-for="item in fillList" :value="item.value" :key="item.value" :class="{'ivu-select-item-selected ivu-select-item-focus':order==item.value}">{{ item.label}}</Option>
                </Select>