import Vue from 'vue'
import SvgIcon from '@/components/SvgIcon'// svg component
// register globally
Vue.component('svg-icon', SvgIcon)
// 在./svg下查找 “.svg”文件
const req = require.context('./svg', false, /\.svg$/)
const requireAll = requireContext => requireContext.keys().map(requireContext)
requireAll(req)

//全局加載就可以了
import '@/icons/index.js'

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

<div>
  <svg-icon icon-class="peoples" />
</div>

module.exports = { 
   	 chainWebpack: config => {
   	    config.module
   	    .rule('svg')
   	    .exclude.add(resolve('src/icons'))
   	    .end()
   	    config.module
   	    .rule('icons')
   	    .test(/\.svg$/)
   	    .include.add(resolve('src/icons'))
   	    .end()
   	    .use('svg-sprite-loader')
   	    .loader('svg-sprite-loader')
   	    .options({
   	      symbolId: 'icon-[name]'
   	    })
   	    .end()
   	  }	
   }

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