How to write vue plug-in using vue-cli

var path = require('path')
var webpack = require('webpack')

module.exports = {
 entry: './src/index.js',
 output: {
  path: path.resolve(__dirname, './dist'),
  publicPath: '/dist/',
  filename: 'vue-toast.js',
  // 打包后的格式（三种规范amd,cmd,common.js)通过umd规范可以适应各种规范，以及全局window属性
  libraryTarget:'umd',
 },
 module: {
  rules: [
   {
    test: /\.vue$/,
    loader: 'vue-loader',
   },
   {
    test: /\.js$/,
    loader: 'babel-loader',
    exclude: /node_modules/
   },
   
  ]
 },
 plugins:[]
}

<template>
 <transition name="toast-fade">
  <p class="toast"
   :class="objClass" 
   v-show="isActive"
   @mouseenter="onMouseenter"
   @mouseleave="onMouseleave"
   >
   <button class="toast-close-button" @click="hide">×</button>
   <p class="toast-container">
    <p class="toast-title">{{title}}</p>
    <p class="toast-content">{{content}}</p>
   </p>
  </p>
 </transition>
</template>

<script>
export default {
 data: () => ({
  list: [],
  title: null,
  content: null,
  type: null,
  isActive: false,
  timer: null,
  onShow: () => {},
  onHide: () => {}
 }),
 computed: {
  objClass () {
   // 样式&#39;success, error, warning, default&#39;
   return this.type ? &#39;toast-&#39; + this.type : null
  }
 },
 methods: {
  // 显示
  show (params) {
   let {content, title, onShow, onHide, type} = params
   this.type = type
   this.content = content
   this.title = title
   this.onShow = onShow
   this.onHide = onHide

   this.isActive = true
   this.setTimer()
  },

  // 隐藏
  hide () {
   this.isActive = false
  },

  // 计时器
  setTimer () {
   clearTimeout(this.timer)
   this.timer = setTimeout(() => {
    this.isActive = false
   }, 4000)
  },

  // 鼠标移至组件时保持显示状态
  onMouseenter () {
   clearTimeout(this.timer)
  },

  // 鼠标移开组件时重新定时
  onMouseleave () {
   if (this.isActive) this.setTimer()
  }
 },
 watch: {
  isActive (val) {
   if (val && typeof this.onShow === &#39;function&#39;) {
    this.onShow()
   } else if (!val && typeof this.onHide === &#39;function&#39;) {
    this.onHide()
   }
  }
 }
}
</script>

<style>
.toast {
 position: fixed;
 top: 10px;
 right: 10px ;
 display: block;
 width: 300px;
 overflow: hidden;
 box-shadow: 0 0 6px #999;
 opacity: .8;
 border-radius: 3px 3px;
 padding: 15px 15px 15px 15px;
 background-position: 15px center;
 background-repeat: no-repeat;
 color: #333;
 background-color: #f0f3f4;
}

.toast-success {
 color: #fff;
 background-color: #51a351;
 padding: 15px 15px 15px 50px;
 background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADsSURBVEhLY2AYBfQMgf///3P8+/evAIgvA/FsIF+BavYDDWMBGroaSMMBiE8VC7AZDrIFaMFnii3AZTjUgsUUWUDA8OdAH6iQbQEhw4HyGsPEcKBXBIC4ARhex4G4BsjmweU1soIFaGg/WtoFZRIZdEvIMhxkCCjXIVsATV6gFGACs4Rsw0EGgIIH3QJYJgHSARQZDrWAB+jawzgs+Q2UO49D7jnRSRGoEFRILcdmEMWGI0cm0JJ2QpYA1RDvcmzJEWhABhD/pqrL0S0CWuABKgnRki9lLseS7g2AlqwHWQSKH4oKLrILpRGhEQCw2LiRUIa4lwAAAABJRU5ErkJggg==") !important;
}
.toast-error {
 color: #fff;
 background-color: #bd362f;
 padding: 15px 15px 15px 50px;
 background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAHOSURBVEhLrZa/SgNBEMZzh0WKCClSCKaIYOED+AAKeQQLG8HWztLCImBrYadgIdY+gIKNYkBFSwu7CAoqCgkkoGBI/E28PdbLZmeDLgzZzcx83/zZ2SSXC1j9fr+I1Hq93g2yxH4iwM1vkoBWAdxCmpzTxfkN2RcyZNaHFIkSo10+8kgxkXIURV5HGxTmFuc75B2RfQkpxHG8aAgaAFa0tAHqYFfQ7Iwe2yhODk8+J4C7yAoRTWI3w/4klGRgR4lO7Rpn9+gvMyWp+uxFh8+H+ARlgN1nJuJuQAYvNkEnwGFck18Er4q3egEc/oO+mhLdKgRyhdNFiacC0rlOCbhNVz4H9FnAYgDBvU3QIioZlJFLJtsoHYRDfiZoUyIxqCtRpVlANq0EU4dApjrtgezPFad5S19Wgjkc0hNVnuF4HjVA6C7QrSIbylB+oZe3aHgBsqlNqKYH48jXyJKMuAbiyVJ8KzaB3eRc0pg9VwQ4niFryI68qiOi3AbjwdsfnAtk0bCjTLJKr6mrD9g8iq/S/B81hguOMlQTnVyG40wAcjnmgsCNESDrjme7wfftP4P7SP4N3CJZdvzoNyGq2c/HWOXJGsvVg+RA/k2MC/wN6I2YA2Pt8GkAAAAASUVORK5CYII=") !important;
}
.toast-warning {
 color: #fff;
 background-color: #f89406;
 padding: 15px 15px 15px 50px;
 background-image: url("data:image/png;base64,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") !important;
}
.toast:hover {
 opacity: 1;
 box-shadow: 0 0 18px #888;
 transition: all 200ms ease;
}
.toast-container {
 vertical-align: middle;
}

.toast-fade-enter, .toast-fade-leave-active {
 opacity: 0;
 transform: translateX(100%);
}
.toast-fade-leave-active,
.toast-fade-enter-active {
 transition: all 400ms cubic-bezier(.36,.66,.04,1);
}
.toast-title {
 font-size: 14px;
 font-weight: bold;
}
.toast-close-button {
  padding: 2px 2px;
  border: none;
  background: transparent;
  position: relative;
  right: -10px;
  top: -15px;
  float: right;
  font-size: 20px;
  font-weight: bold;
  color: #ffffff;
  -webkit-text-shadow: 0 1px 0 #ffffff;
  text-shadow: 0 1px 0 #ffffff;
  -ms-filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=80);
  filter: alpha(opacity=80);
}
</style>

import ToastComponent from './toast.vue'
let Toast = {};
Toast.install = function(Vue, options = {}) {
  // extend组件构造器
  const VueToast = Vue.extend(ToastComponent)
  let toast = null
  function $toast(params) {
    return new Promise( resolve => {
      if(!toast) {
        toast = new VueToast()
        toast.$mount()
        document.querySelector(options.container || 'body').appendChild(toast.$el)
      }
      toast.show(params)
      resolve()
    })
  }
  Vue.prototype.$toast = $toast
}
if(window.Vue){
  Vue.use(Toast)
}
export default Toast

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Title</title>
 <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no">
 <!--引入-->
 <script src="node_modules/vue/dist/vue.js"></script>
 <script src="dist/vue-toast.js"></script>
</head>

<body>
 <p id="app">
  <h1>vue-toast，{{msg}}</h1>
  <p class="demo-box">
   <button @click="test">默认效果</button>
  </p>
 </p>
 <script>
  var vm = new Vue({
   el: "#app",
   data: {
    msg: &#39;你好&#39;
   },
   methods: {
    test() {
      this.$toast({
       title:&#39;消息提示&#39;,
       content: &#39;您有一条新消息&#39;,
       type: &#39;warning&#39;,
       onShow: ()=>{
         console.log(&#39;on toast show&#39;)
       },
       onHide: ()=>{
         console.log(&#39;on toast hide&#39;)
       }
     })
    }
   }
  })

 </script>
</body>
</html>