Vue3 + Element-Plus + 外部svg组件封装step1：文件结构 step2：安装svg-sprite

step1：文件结构

step2：安装svg-sprite-loader

npm install svg-sprite-loader -D
# via yarn
yarn add svg-sprite-loader -D

step3：封装SvgIcon.vue组件

<script setup lang="ts">
import { computed } from 'vue-demi'
const props = defineProps(['name'])
const iconName = computed(() => `#icon-${props.name}`)
</script>

<template>
  <svg class="svg-icon" aria-hidden="true">
    <use :xlink:href='iconName'></use>
  </svg>
</template>

<style lang="scss" scoped>
.svg-icon {
  vertical-align: middle;
  fill: currentColor;
  overflow: hidden;
}
</style>

step4：在plugins文件夹创建svgBuilder.js插件（重点）

import { readFileSync, readdirSync } from 'fs'

let idPerfix = ''
const svgTitle = /<svg([^>+].*?)>/
const clearHeightWidth = /(width|height)="([^>+].*?)"/g

const hasViewBox = /(viewBox="[^>+].*?")/g

const clearReturn = /(\r)|(\n)/g

function findSvgFile(dir) {
  const svgRes = []
  const dirents = readdirSync(dir, {
    withFileTypes: true,
  })
  for (const dirent of dirents) {
    if (dirent.isDirectory()) {
      svgRes.push(...findSvgFile(dir + dirent.name + '/'))
    } else {
      const svg = readFileSync(dir + dirent.name)
        .toString()
        .replace(clearReturn, '')
        .replace(svgTitle, ($1, $2) => {
          // console.log(++i)
          // console.log(dirent.name)
          let width = 0
          let height = 0
          let content = $2.replace(clearHeightWidth, (s1, s2, s3) => {
            if (s2 === 'width') {
              width = s3
            } else if (s2 === 'height') {
              height = s3
            }
            return ''
          })
          if (!hasViewBox.test($2)) {
            content += `viewBox="0 0 ${width} ${height}"`
          }
          return `<symbol id="${idPerfix}-${dirent.name.replace(
            '.svg',
            ''
          )}" ${content}>`
        })
        .replace('</svg>', '</symbol>')
      svgRes.push(svg)
    }
  }
  return svgRes
}

export const svgBuilder = (path, perfix = 'icon') => {
  if (path === '') return
  idPerfix = perfix
  const res = findSvgFile(path)
  // console.log(res.length)
  // const res = []
  return {
    name: 'svg-transform',
    transformIndexHtml(html) {
      return html.replace(
        '<body>',
        `
          <body>
            <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style="position: absolute; width: 0; height: 0">
              ${res.join('')}
            </svg>
        `
      )
    },
  }
}

step5：vite.config.js配置修改

import { svgBuilder } from './src/plugins/svgBuilder'; 

export default defineConfig({
  plugins: [svgBuilder('./src/assets/svg/')] // 这里已经将src/assets/svg/下的svg全部导入，无需再单独导入
})