vue根据浏览器窗口大小自适应排列多个div

<template>
    <div class="bigBox">
        <div class="smallBox" :style="{'width':width}" v-for="item in 10" :key="item">
            <div class="contentItem">{{ item }}</div>
        </div>
    </div>
</template>
<script>
export default {
    data() {
        return {
            width: '20%'
        };
    },
    created() {
        this.width = 100 / Math.trunc(window.innerWidth / 200) + '%';
        window.addEventListener('resize', this.reSizer);
    },
    destroyed() {
        window.removeEventListener('resize', this.reSizer);
    },
    methods: {
        reSizer() {
            this.width = 100 / Math.trunc(window.innerWidth / 200) + '%';
        }
    }
};
</script>

<style scoped lang="scss">
.bigBox {
    display: flex;
    flex-wrap: wrap;
    .smallBox {
        padding: 10px;
        .contentItem {
            height: 200px;
            border: 1px solid black;
        }
    }
}
</style>

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