怎样让下面图中的两个class共存,前面那个是我循环是添加的class。后面点击时给他添加一个这个class
<div class="backstage-left-bottom">
<ul v-for="subMenu in this.$router.options.routes" v-if="subMenu.isBackStage">
<li v-for="item in subMenu.children" :class="item.icon" :class="{isPosition:type==item.icon}" @click="type==item.icon">
<ul class="child-router">
<li v-for="menu in item.children">{{menu}}</li>
</ul>
</li>
</ul>
</div>
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