在vue3+vite+Ts项目中使用svg

1、首先在conponents目录下创建组件

svgIcon目录下的index.vue代码：

<template>
  <svg aria-hidden="true" class="svg-icon">
    <use :xlink:href="symbolId" :fill="color" ></use>
  </svg>
</template>

<script setup lang="ts">
import { defineProps,computed } from "vue";

const props = defineProps({
  prefix: { type: String, default: "icon" },
  iconClass: { type: String, required: true },
  color: { type: String, default: "" },
});

const symbolId = computed(() => `#${props.prefix}-${props.iconClass}`);
</script>

<style scoped>
.svg-icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  overflow: hidden;
  fill: currentColor;
}

</style>

2、在main.ts文件中在main.js里面全局注入svg-icon组件

import { createApp } from 'vue'
import App from './App.vue'
import svgIcon from '@/components/svgIcon/index.vue'
createApp(App).component('svg-icon', svgIcon).mount('#app');

3、在utils目录下创建svg.ts文件

import { readFileSync, readdirSync } from 'fs'

let idPerfix = ''
const svgTitle = /+].*?)>/
const clearHeightWidth = /(width|height)="([^>+].*?)"/g
const hasViewBox = /(viewBox="[^>+].*?")/g
const clearReturn = /(\r)|(\n)/g

// 查找svg文件
function svgFind(e: any) {
  const arr = []
  const dirents = readdirSync(e, { withFileTypes: true })
  for (const dirent of dirents) {
    if (dirent.isDirectory()) arr.push(...svgFind(e + dirent.name + '/'))
    else {
      const svg = readFileSync(e + dirent.name)
        .toString()
        .replace(clearReturn, '')
        .replace(svgTitle, ($1: any, $2: any) => {
          let width = 0,
            height = 0,
            content = $2.replace(clearHeightWidth, (s1: any, s2: any, s3: any) => {
              if (s2 === 'width') width = s3
              else if (s2 === 'height') height = s3
              return ''
            })
          if (!hasViewBox.test($2)) content += `viewBox="0 0 ${width} ${height}"`
          return `${idPerfix}-${dirent.name.replace('.svg', '')}" ${content}>`
        }).replace('', '')
      arr.push(svg)
    }
  }
  return arr
}

// 生成svg
export const createSvg = (path: any, perfix = 'icon') => {
  if (path === '') return
  idPerfix = perfix
  const res = svgFind(path)
  return {
    name: 'svg-transform',
    transformIndexHtml(dom: String) {
      return dom.replace(
        '',
        `${res.join('')}`
      )
    }
  }
}

如果是js文件就写下面代码：

import { readFileSync, readdirSync } from 'fs'

let idPerfix = ''
const svgTitle = /+].*?)>/
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} ${height}"`
          }
          return `${idPerfix}-${dirent.name.replace(
            '.svg',
            ''
          )}" ${content}>`
        })
        .replace('', '')
      svgRes.push(svg)
    }
  }
  return svgRes
}

export const  createSvg = (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(
        '',
        `
          
            ${res.join('')}
            
        `
      )
    }
  }
}

4、在vite.config.js修改配置

iimport { createSvg } from './src/utils/svg'

export default defineConfig({
  createSvg('./src/icons/')
})

./src/icons/ 路径指的是

5、然后在icons文件下引入svg图标

引入svg图标方法(官网)：

1. 
2. 

6、最后在页面中使用

   <svg-icon icon-class="next"></svg-icon>
    <svg-icon icon-class="magnify" ></svg-icon>

icon-class里面的是对应 icons目录下的文件名