使用vue组件封装共用的组件

import ListItem from './components/list.vue'//封装共用组件方法一
Vue.component('ListItem',ListItem)

import child from './component.vue'
 
export default child.install = function (Vue) {
  Vue.component(child.name,child)
}

import child from './components/component/component.js'//封装共用组件方法二
Vue.use(child)

<template>
  <!-- 公用提示信息页面 -->
  <el-dialog
    title="提示"
    :visible.sync="dialogVisible"
    :show-close="false"
    top="40vh"
    width="30%"
  >
    <div class="content">
      <span>{{ text }}</span>
    </div>
  </el-dialog>
</template>

<script>
export default {
  data() {
    return {
      dialogVisible: true,
      text: ""
    };
  }
};
</script>

<style lang="less" scoped>
.content {
  font-size: 16px;
  color: #333;
  text-align: center;
  span {
    margin-left: 10px;
  }
}
/deep/ .el-dialog__header {
  padding: 0;
  height: 50px;
  line-height: 50px;
  text-align: center;
  font-weight: 600;
  background-color: #08519c;
}
/deep/ .el-dialog__title {
  color: #fff;
}
</style>

// 公共提示信息js
import Vue from "vue";
import Toast from "./dialogMessage.vue"; //引入组件
// 返回一个“扩展实例构造器”
let ToastConstructor = Vue.extend(Toast);
let myToast = (text, duration) => {
  let toastDom = new ToastConstructor({
    el: document.createElement("div") //将toast组件挂载到新创建的div上
  });
  document.body.appendChild(toastDom.$el); //把toast组件的dom添加到body里
  toastDom.text = text;
  toastDom.duration = duration;
  // 在指定 duration 之后让 toast消失
  setTimeout(() => {
    toastDom.dialogVisible = false;
  }, toastDom.duration);
  // 调用时  this.$toast("新内容", 1000);
};
export default myToast;

import toast from "./components/dialogMessage.js"; //引入toast函数
  //给Vue对象添加$toast方法
  Vue.prototype.$toast = toast;

 this.$toast("新内容", 1000);