<template>
	<div class="toast" v-if="isShow">
		<div class="toast-div">{{ text }}</div>
	</div>
</template>
<script>
export default{
	data(){
		return {
			text:'内容',
			isShow:true,
			duration:1500
		}
	}
}
</script>
<style>
*{
	margin: 0;
	padding: 0;
}
.toast{
 	position: fixed;
 	left: 50%;
 transform: translate(-50%, 0);
 margin-top: 5rem;
 background: #000000;
 line-height: 0.7rem;
	color: #FFFFFF;
	padding: 0 0.2rem;
	border-radius: 0.2rem;
}
</style>

import Vue from 'vue'; 
import Toast from '@/components/Toast'; //引入组件 
let ToastConstructor = Vue.extend(Toast) // 返回一个“扩展实例构造器” 
 
let myToast = ()=>{ 
 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 
} 
export default myToast; 

<template>
 <div class="hello">
 <button @click="showToast">按钮</button>
 </div>
</template>
<script>
import Vue from 'vue';
import toast from './js/toast'; //引入toast函数
Vue.prototype.$toast = toast;  //给Vue对象添加$toast方法
export default {
 name: 'hello',
 data () {
 return {
 
 }
 },
 methods:{
 	showToast(){
 		this.$toast();  //现在就可以调用了
 	}
 }
}
</script>

import Vue from 'vue'; 
import Toast from '@/components/Toast'; //引入组件 
let ToastConstructor = Vue.extend(Toast) // 返回一个“扩展实例构造器” 
 
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.isShow = false; 
 }, toastDom.duration); 
} 
export default myToast;