// B.vue

<template>
	<div>
		B:{{demo}}
		<comC></comC>
	</div>
</template>

<script>
	import comC from './C.vue'
	export default {
		name: "B",
		inject: ['for'],
		data() {
			return {
				demo: this.for
			}
		},
		components: {
			comC
		}
	}
</script>