Vue中provide和inject的使用教程详解

<template>
	<div class="djs-box">
		<div class="topBox">
			<h3>vue中provide/inject怎么使用（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">
               <ComA></ComA>
		</div>
	</div>
</template>

<script>
	import ComA from '../components/provideInject/demo-A.vue';
	export default {
		components:{
			ComA
		},
		  provide() {
		    return {
		      message: 'Hello from ROOT-message',
			  message2: 'Hello from ROOT-message2'
		    };
		  }
	}
</script>
<style scoped>
	.djs-box {
		width: 1000px;
		height: 650px;
		margin: 50px auto;
		border: 1px solid teal;
	}

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

	.dajianshi {
		width: 98%;
		height: 480px;
		margin: 5px auto 0;
		display: flex;
		justify-content: space-between;
		border:1px solid #369;
	}

</style>

<template>
	<div style="margin-top: 100px;">
		<div class="left">
			<h2>儿子组件从跟组件获取的信息message：</h2>
			<div style="color: blue;">{{message}}</div>
		</div>
		
		<div class="right">
			<h2>孙子组件从跟组件获取的内容message2：</h2>
			<ChildA></ChildA>
		</div>
		
	</div>
</template>

<script>
   	import ChildA from '@/components/provideInject/demo-A-A.vue';
	export default {
		inject: ['message'],
		components:{
			 ChildA
		},
	}
</script>
<style scoped>
	.left{ width: 48%; float:left;}
	.right{ width: 48%; float:right; height:300px; border:1px solid #ddd;}
</style>

<template>
	<div>
		<div style="color: red;">{{ message2 }}</div>
	</div>
</template>

<script>
	export default {
      inject: ['message2'],
	}
</script>