SOURCE

new Vue({
    el: '#app',
    data() {
        return {
            arr: [1,2,3]
        }
    },
    methods:{
        deleteData() {
            this.arr.splice(1,1)
        }
    }
})

<div id="app">
    <div v-for="(item, index) in arr" :key="index">
        {{item}}
        <input/>
    </div>

    <button @click="deleteData">删除第二个元素</button>
</div>