v-show = status == index 然后 toggle(index) { this.status= index}

<div class="sildermun" v-show="index == activeIndex">
    {{tab.name}}
</div>

...
{
    data: {
        activeIndex: null
    },
    
    methods: {
        toggle(index){
            this.activeIndex = index;
        }
    }
}