flex自适应页面

<template>
  <div id="fb-content" :style="{ padding: '0 ' + boxPadding + 'px' }">
    <div
      v-for="(item, index) in props['boxList']"
      :key="index"
      :style="{ width: 100 / boxNum + '%' }"
    >
      <div style="display: flex; justify-content: center">
        <slot name="box" :item="item"></slot>
      </div>
    </div>
  </div>
</template>
<script setup lang="ts">
  import { defineProps, onMounted, ref } from 'vue';
  const props = defineProps({
    boxWidth: {
      type: Number,
      default: 1,
    },
    gap: {
      type: Number,
      default: 1,
    },
    boxList: {
      type: Object,
    },
  });
  const boxNum = ref(0);
  const boxPadding = ref(0);
  onMounted(() => {
    init();
    window.addEventListener('resize', () => {
    //监听页面变化
      init();
    });
  });
  function init() {
    let dom = document.getElementById('fb-content');
    let contentWidth = dom?.clientWidth || dom?.offsetWidth || 1;
    boxNum.value = contentWidth
      ? parseInt((contentWidth - props['gap']) / (props.boxWidth + props['gap']))
      : 1;
    boxPadding.value = parseInt(
      (contentWidth - (props['boxWidth'] + props['gap']) * boxNum.value) / 2,
    );
  }
</script>
<style lang="less">
  #fb-content {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
  }
</style>

间距固定，左右padding自适应