搞个一手环境-处理svg组件（2）

npm install svg-sprite-loader -D

  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()

<template>
  <!--  接受外链形式的图片<svg-icon icon-class="https://xxxx.svg" /> -->
 <!--如果是外链，将图片展示在div上面，利用计算属性，动态添加样式-->
  <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>
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() {
//使用尽可能的方便，只有名字不同而已
      return `#icon-${this.iconClass}`;
    },
    svgClass() {
//传了svgClass就是添加这个class,否则默认有个svg-icon
      if (this.className) {
        return "svg-icon " + this.className;
      } else {
        return "svg-icon";
      }
    },
    styleExternalIcon() {
      return {
        mask: `url(${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;
  //css3新特性
  fill: currentColor;
  overflow: hidden;
}

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

/**
* @param {string} path
* @returns {Boolean}
*/
export function isExternal(path) {
  return /^(https?:|mailto:|tel:)/.test(path)
}

import Vue from 'vue';
//引入svgicon组件
import  SvgIcon from 'comps/SvgIcon'
//全局注册
Vue.component('svg-icon', SvgIcon)

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