tab 优化

 <template>
     <div v-if="channel.length" class="channel-tab">
-        <a v-for="(index, item) in channel" v-bind:class="{focus: index === current}" v-on:click.prevent="changeChannel(index)" href="/{{item.channel}}">
+        <div class="channel" v-for="(index, item) in channel" v-bind:class="{focus: index === current}" v-on:click="changeChannel(index)">
             <span class="name">{{item.name | uppercase}}</span>
-        </a>
+        </div>
     </div>
 </template>
 
@@ -61,7 +61,7 @@
         text-align: center;
         background: #fff;
 
-        a {
+        .channel {
             display: inline-block;
             line-height: 90px;
             width: 33%;