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VUEJS 展开收起问题

clipboard.png
假设服务器加载来有60个品牌(一个包含60个对象的json数组),默认展示前8条品牌,点击MORE,展开所有的,这个在VUE里面怎么写比较好一点?

<a class="show_more" @click="showAll" href="javascript:;">M O R E</a>
    <ul class="cls_partners" v-if="isShowAll">
        <li v-for = "(item,index) in partners">
            <img :src="item.url" alt="">
        </li>
    </ul>

我现在写成这样,不知道怎么用index来控制前几条,求指点


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<a class="show_more" @click="showAll" href="javascript:;">M O R E</a>
    <ul class="cls_partners" >
        <li v-for = "n in count">
            <img :src="partners[n-1].url" alt="">
        </li>
    </ul>
    
    data(){
        return {
            count:8
        }
    },
    methods:{
        showAll(){
            this.count=this.partners.length
        }
    }

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