封装message组件

<template>
	<transition name="my-fade" @after-leave="handAfterLeave">
		<div :class="['custom-message',`my-message-${type}`]"
		 v-text="msg" v-show="isShow" :style="`top:${topOffset}px`"></div>
	</transition>
</template>

<script>
	export default {
		name: 'CustomMessage',
		data() {
			return {
				msg: '',
				duration: 3000,
				isShow:false,
				topOffset:20,
				onClose:null,
				type:'success'
			
			}
		},
		mounted() {
            this.closeMsg()
		},
		
		methods: {
			// 过度动画结束时销毁和移除当前节点dom
			handAfterLeave(){
				this.$destroy(true)
				this.$el.parentNode.removeChild(this.$el)
			},
			// 设置定时器 关闭消息
			closeMsg() {
				this.timer = setTimeout(() => {
					this.isShow=false
					this.close()
					clearTimeout(this.timer)
				}, this.duration)
			},
			// 设置关闭时触发的关闭回调函数
			close(){
				if(typeof this.onClose==='function'){
				    this.onClose(this)
				
				}
			}
		},
	}
</script>

<style scoped>
	.my-fade-enter, .my-fade-leave-to{
		opacity: 0;
		transform: translateY(-100%);
	}
	.custom-message {
		position: fixed;
		left: 38%;
	    top: 20px;
		/* transform: translateX(-50%); */
		border-radius: 5px;
		min-width: 380px;
		padding: 12px;
		font-size: 14px;

		font-weight: 500;
		transition: all 0.4s ease-in-out;
	}
	.my-message-info{
		color: #909399;
		background-color: ##edf2fc;
	}
	.my-message-success{
		color:#67c23a;
		background-color: #f0f9eb;
	}
	.my-message-warning{
		color: #e6a23c;
		background-color: #fdf6ec;
	}
	.my-message-error{
		color: #f56c6c;
		background-color: #fef0f0;
	}
</style>

使用vue.extend()进行构造

import Vue from 'vue'
import CustomMessage from '../components/CusMessage.vue'
let MsgConstructor = Vue.extend(CustomMessage) // 生成vc的构造函数
let instant
let instants = []
let seed = 0
const Msg = (options) => {
	if (typeof options === 'string') {
		options = {
			msg: options
		}
		
	}
	let userOnClose = options.onClose //用户传的关闭时的回调函数
	let id = "my_message_" + seed++ // 给每个vc 绑定唯一id
	options.onClose = function() { //触发定时器结束关闭消息的回调，在这里可移除数组intstants中关闭的消息
		Msg.close(id, userOnClose)
	}
	instant = new MsgConstructor({ // 构造一个vc实例对象(生成一条消息)
		data: options
	})
	instant.id = id
	instant.$mount() //将实例挂到index.html中的body下
	document.body.appendChild(instant.$el)
	instant.isShow = true //将isShow 属性设置为true（用于过渡动画切换）
	let topOffset = options.offset || 20
	if (instants.length === 0) {
		instant.topOffset = 20
	}
	instants.forEach(item => topOffset += item.$el.offsetHeight + 16) // 设置style的top值
	instant.topOffset = topOffset
	instant.$el.style.zIndex = seed
	instants.push(instant)
	return instant
}
//  四种不同类型的消息
let types = ['info', 'success', 'warning', 'error']
types.forEach(type => {
	Msg[type] = (options) => {
		if (typeof options === 'object') {
			return Msg({
				type,
				...options
			})
		}
		return Msg({
			type,
			msg: options
		})
	}

})
Msg.close = (id, userOnClose) => {
	let removeHeight;
	try {
		instants.forEach((item, index) => {
			if (id === item.id) {
				// 如果用户设置了回调，就在关闭时执行回调
				if (typeof userOnClose === 'function') {
					userOnClose(item)
				}
				removeHeight = item.$el.offsetHeight
				instants.splice(index, 1) // 移除当前的实例
				throw new Error("终止") //终止当前循环
			}
		})
	} catch (e) {
		//TODO handle the exception
	}
	// 如果只有小于等于一条数据则直接返回
	if (instants.length <= 0) return
	instants.forEach((item, index) => {
		item.$el.style.top = parseInt(item.$el.style.top) - removeHeight - 16 + 'px' //给以后的实例设置top
	})
}
export default Msg

引入main.js中并挂在vue原型上

import Msg from './plugin/customMessage'
Vue.prototype.$msg=Msg

使用

htm

<el-button @click="info">info</el-button>
<el-button @click="success">success</el-button>
<el-button @click="warning">warning</el-button>
<el-button @click="error">error</el-button>

js

info() {
				this.$msg.info("我是info")
				
			},
			success() {
				this.$msg.success("我是success")
			},
			warning() {
				this.$msg.warning("我是warning")
			},
			error() {
				this.$msg.error("我是error")
			},

效果