element 使用svg-icon图标

1.创建svg-icon组件

目录位置 src/components/SvgIcon/index.vue

<template>
  <div v-if="isExternal" :style="styleExternalIcon" class="svg-external-icon svg-icon" v-on="$listeners" />
  <svg v-else :class="svgClass" aria-hidden="true" v-on="$listeners">
    <use :xlink:href="iconName" />
  </svg>
</template>

<script>
// doc: https://panjiachen.github.io/vue-element-admin-site/feature/component/svg-icon.html#usage
import { isExternal } from '@/utils/validate'

export default {
  name: 'SvgIcon',
  props: {
    iconClass: {
      type: String,
      required: true
    },
    className: {
      type: String,
      default: ''
    }
  },
  computed: {
    isExternal() {
      return isExternal(this.iconClass)
    },
    iconName() {
      return `#icon-${this.iconClass}`
    },
    svgClass() {
      if (this.className) {
        return 'svg-icon ' + this.className
      } else {
        return 'svg-icon'
      }
    },
    styleExternalIcon() {
      return {
        mask: `url(${this.iconClass}) no-repeat 50% 50%`,
        '-webkit-mask': `url(${this.iconClass}) no-repeat 50% 50%`
      }
    }
  }
}
</script>

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

.svg-external-icon {
  background-color: currentColor;
  mask-size: cover!important;
  display: inline-block;
}
</style>

2.读取svg文件

目录位置 src/icons/index.js

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)

3.存放svg图片

在同一目录下新建一个svg文件夹，用于存放svg图片。

4.安装依赖

比较好用的版本有  "svg-sprite-loader": "^3.8.0",

npm i svg-sprite-loader --save

5.修改配置

针对vue-cli2，在webpack.base.config.js中

      {
        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]')
        }
      },

针对vue-cli3，在vue.config.js中

const path = require("path");
const { defineConfig } = require('@vue/cli-service')
function resolve(dir) {
  return path.join(__dirname, dir);
}
module.exports = defineConfig({
  transpileDependencies: true,
  lintOnSave:false,
  chainWebpack: config => {
    config.resolve.alias
      .set("@", resolve("src"))

    config.module
      .rule('svg').uses.clear();

    config.module
      .rule('svg')
      .exclude.add([resolve('src/icons'), resolve('src/views')])
      .end()

    config.module
      .rule('icons')
      .test(/\.svg$/)
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()
  },
})

6.引入组件

在main.js里面引入

import '@/icons' // icon

7.使用 svg-icon

<svg-icon icon-class="404" />

 8.修改icon颜色

普通的svg，从标签上直接改成红色

.svg-icon {
    color: red;
}

fill修改颜色：在<path> 标签中修改fill 属性，如果没有这个属性，就新增