在Vuejs中包含“活動”類時如何切換圖標

Question

我有一個帶有圖標的底部導航欄。 當路由器鏈接具有“活動”類時，它怎么會變成活動圖標？ 默認圖標 1 處於活動狀態。

  <li>
   <router-link v-if="active" :class="{active}" active-class="active">
      Icon 1 active
    </router-link>
    <router-link v-if="!active" :class="{active}" active-class="active">
      Icon 1
    </router-link>
  </li>
  <li>
   <router-link v-if="active" :class="{active}" active-class="active">
      Icon 2 active
    </router-link>
    <router-link v-if="!active" :class="{active}" active-class="active">
      Icon 2
    </router-link>
  </li>
  <li>
   <router-link v-if="active" :class="{active}" active-class="active">
      Icon 3 active
    </router-link>
    <router-link v-if="!active" :class="{active}" active-class="active">
      Icon 3
    </router-link>
  </li>

Answer 1

解決方案：

綁定 HTML 類：

  <li>
    <router-link @click="isActive1 = true" :class="{ active: isActive1 }">
      Icon 1
    </router-link>
  </li>
  <li>
    <router-link @click="isActive2 = true" :class="{ active: isActive2 }">
      Icon 2
    </router-link>
  </li>
  <li>
    <router-link @click="isActive3 = true" :class="{ active: isActive3 }">
      Icon 3 Active
    </router-link>
  </li>

實現isActive變量：

data: {
   isActive1: true, // default icon1 
   isActive2: false,
   isActive3: false,
 }

並實現觀察者：

watch: {
  isActive1(val) {
    if(val === true) {
      this.isActive2 = false
      this.isActive3 = false
    }
  },
  isActive2(val) {
    if(val === true) {
      this.isActive1 = false
      this.isActive3 = false
    }
  },
  isActive3(val) {
    if(val === true) {
      this.isActive1 = false
      this.isActive2 = false
    }
  }
}

文檔： https ://v2.vuejs.org/v2/guide/class-and-style.html