vue增加svg图片支持

1、要使用svg先安装对应的loader

npm install svg-sprite-loader

2、在webpack.base.conf.js增加如下配置：

{
        test: /\.svg$/,
        loader: 'svg-sprite-loader',
        include: [resolve('src/icons')],
        options: {
          symbolId: 'icon-[name]'
        }
      },
      
      {
        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
        loader: 'url-loader',
        exclude: [resolve('src/icons')],
        options: {
          limit: 10000,
          name: utils.assetsPath('img/[name].[hash:7].[ext]')
        }
      },
      

'use strict'
const path = require('path')
const utils = require('./utils')
const config = require('../config')
const vueLoaderConfig = require('./vue-loader.conf')
var webpack = require('webpack')

function resolve (dir) {
  return path.join(__dirname, '..', dir)
}

const createLintingRule = () => ({
  test: /\.(js|vue)$/,
  loader: 'eslint-loader',
  enforce: 'pre',
  include: [resolve('src'), resolve('test')],
  options: {
    formatter: require('eslint-friendly-formatter'),
    emitWarning: !config.dev.showEslintErrorsInOverlay
  }
})

module.exports = {
  context: path.resolve(__dirname, '../'),
  plugins: [
    // new webpack.optimize.CommonsChunkPlugin('common'),
    new webpack.ProvidePlugin({
      jQuery: 'jquery',
      $: 'jquery'
    })
  ],
  entry: {
    app:
      process.env.NODE_ENV === 'mock'
        ? ['./src/main.js', './src/mock/index.js']
        : './src/main.js'
  },
  output: {
    path: config.build.assetsRoot,
    filename: '[name].js',
    publicPath:
      process.env.NODE_ENV === 'production'
        ? config.build.assetsPublicPath
        : config.dev.assetsPublicPath
  },
  resolve: {
    extensions: ['.js', '.vue', '.json'],
    alias: {
      vue$: 'vue/dist/vue.esm.js',
      '@': resolve('src'),
      '@c': resolve('src/custom')
    }
  },
  module: {
    rules: [
      ...(config.dev.useEslint ? [createLintingRule()] : []),
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: vueLoaderConfig
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        include: [
          resolve('src'),
          resolve('test'),
          resolve('node_modules/webpack-dev-server/client')
        ]
      },
      
      {
        test: /\.svg$/,
        loader: 'svg-sprite-loader',
        include: [resolve('src/icons')],
        options: {
          symbolId: 'icon-[name]'
        }
      },
      
      {
        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
        loader: 'url-loader',
        exclude: [resolve('src/icons')],
        options: {
          limit: 10000,
          name: utils.assetsPath('img/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('media/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
        }
      }
    ]
  },
  node: {
    // prevent webpack from injecting useless setImmediate polyfill because Vue
    // source contains it (although only uses it if it's native).
    setImmediate: false,
    // prevent webpack from injecting mocks to Node native modules
    // that does not make sense for the client
    dgram: 'empty',
    fs: 'empty',
    net: 'empty',
    tls: 'empty',
    child_process: 'empty'
  },
  externals: {
    vue: 'Vue',
    'vue-router': 'VueRouter',
    vuex: 'Vuex',
    'element-ui':'ELEMENT',
    axios: 'axios',
    echarts: 'echarts'
  },
  plugins: [
    new webpack.DllReferencePlugin({
      context: path.join(__dirname, '../dll'),
      manifest: require('../dll/manifest.json')
    })
  ]
}

注意：如果不增加这行配置 “exclude: [resolve('src/icons')],”会报错 报错如下：

Module build failed: InvalidSvg: svg-sprite-loader exception.

3、封装svg组件

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

  <script>
  export default {
    name: 'SvgIcon',
    props: {
      iconClass: {
        type: String,
        required: true
      },
      // eslint-disable-next-line vue/require-default-prop
      className: {
        type: String
      }
    },
    computed: {
      iconName () {
        return `#icon-${this.iconClass}`
      },
      svgClass () {
        if (this.className) {
          return 'svg-icon ' + this.className
        } else {
          return 'svg-icon'
        }
      }
    }
  }
  </script>

  <style scoped>
  .svg-icon {
    /* width: 1.3rem;
    height: 1.3rem;
    vertical-align: -0.15rem; */
    width: 22px;
    height: 22px;
    vertical-align: -5px;
    fill: currentColor;
    overflow: hidden;
  }
  </style>

4、引用svg组件并加载目录下的svg图片

import Vue from 'vue'
import SvgIcon from '@/components/SvgIcon'// svg组件

// register globally
Vue.component('svg-icon', SvgIcon)

const requireAll = requireContext => requireContext.keys().map(requireContext)
const req = require.context('./svg', false, /\.svg$/)
requireAll(req)

文件目录

5、main.js全局引入

import './icons'