图文详解如何在vue3+vite项目中使用svg
今天在vue3+vite项目练习中,在使用svg时,发现之前的写法不能用,之前的使用方法参考vue2中优雅的使用svg
const req = require.context('./icons/svg', false, /\.svg$/) const requireAll = requireContent => requireContent.keys().map(requireContent) requireAll(req)
然后就各种资料查找,终于实现了,废话不多说,直接上代码:
stept1: 文件目录
stept2: 安装 svg-sprite-loader
npm install svg-sprite-loader -D # via yarn yarn add svg-sprite-loader -D
stept3: 创建svgIcon.vue文件
<template> <svg :class="svgClass" v-bind="$attrs" :style="{color: color}"> <use :xlink:href="iconName" rel="external nofollow" /> </svg> </template> <script setup> import { defineProps, computed } from "vue"; const props = defineProps({ name: { type: String, required: true }, color: { type: String, default: '' } }) const iconName = computed(()=>`#icon-${props.name}`); const svgClass = computed(()=> { console.log(props.name, 'props.name'); if (props.name) { return `svg-icon icon-${props.name}` } return 'svg-icon' }); </script> <style lang='scss'> .svg-icon { width: 1em; height: 1em; fill: currentColor; vertical-align: middle; } </style>
stept4: 创建icons文件夹,存放svg文件
stept5: 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.vue' createApp(App).component('svg-icon', svgIcon).mount('#app');
stept6: 在plugins文件夹创建svgBuilder.js(重点来了), ts版本参考:https://github.com/JetBrains/svg-sprite-loader/issues/434
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> ` ) } } }
stept7: 最后在vite.config.js修改配置
import { svgBuilder } from './src/plugins/svgBuilder'; export default defineConfig({ plugins: [svgBuilder('./src/icons/svg/')] // 这里已经将src/icons/svg/下的svg全部导入,无需再单独导入 })
总结
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