vue中EventBus的使用教程详解

/*
* @Author: 大剑师兰特（xiaozhuanlan），还是大剑师兰特（CSDN）
* @此源代码版权归大剑师兰特所有，可供学习或商业项目中借鉴，未经授权，不得重复地发表到博客、论坛，问答，git等公共空间或网站中。
* @Email: 2909222303@qq.com
* @weixin: gis-dajianshi
* @First published in CSDN
* @First published time: 2024-02-03
*/

<template>
	<div class="djs-box">
		<div class="topBox">
			<h3>vue使用EventBus的图文示例 </h3>
			<div>大剑师兰特, 还是大剑师兰特，gis-dajianshi</div>
		</div>
		<div class="dajianshi">
			<div class="item">
               <ComA></ComA>
			</div>
			<div class="item">
			   <ComB></ComB>
			</div>
		</div>
	</div>
</template>

<script>
	import ComA from '../components/eventbus/demo-A.vue';
	import ComB from '../components/eventbus/demo-B.vue'
	export default {
		data() {
			return {}
		},
		components:{
			ComA,
			ComB
		},
	}
</script>
<style scoped>
	.djs-box {
		width: 1000px;
		height: 650px;
		margin: 50px auto;
		border: 1px solid peru;
	}

	.topBox {
		margin: 0 auto 0px;
		padding: 10px 0 20px;
		background: peru;
		color: #fff;
	}

	.dajianshi {
		width: 98%;
		height: 480px;
		margin: 5px auto 0;
		display: flex;
		justify-content: space-between;
		
	}
	.item{
		width: 48%;
		height: 480px;
		margin-top: 20px;
		text-align: center;
		border: 1px solid #583;		
	}
</style>

<template>
	<div>
		<h2> 组件A：</h2>
		<el-button @click="sendMessage">发送消息给B</el-button>
		<h4> 从B获取的消息：</h4>
		<div style="color: blue;">{{message}}</div>
	</div>
</template>

<script>
	import {
		EventBus
	} from '@/eventbus/index.js';

	export default {
		data() {
			return {
				message: ''
			};
		},
		mounted() {
			EventBus.$on('messageB', (msg) => {
				this.message = msg;
			});
		},
		methods: {
			sendMessage() {
				EventBus.$emit('messageA', 'Hello from Component A');
			}
		}
	}
</script>

<template>
	<div>
		<h2> 组件B：</h2>

		<el-button @click="sendMessage">发送消息给A</el-button>
		<h4> 从A获取的消息：</h4>
		<div style="color: red;">{{ message }}</div>
	</div>
</template>

<script>
	import {
		EventBus
	} from '@/eventbus/index.js';

	export default {
		data() {
			return {
				message: ''
			};
		},
		mounted() {
			EventBus.$on('messageA', (msg) => {
				this.message = msg;
			});
		},
		methods: {
			sendMessage() {
				EventBus.$emit('messageB', 'Hello from Component B');
			}
		}
	}
</script>