Vue 关于$emit与props的使用示例代码

// parent.Vue
<template>
	<div>
      	<p>childMessage: {{childMessage}}</p>
      	<children :sendmessage='childMessage' @showMsg="updataMsg"></children>
	</div>
</template>

import children from ''
export default{
	data () {
		return {
			childMessage: '父组件给子组件传值'
		}
	},
	methods: {
		updataMsg(message) {
			this.childMessage = message
			console.log(this.childMessage)
	components: {
		children
	}
}

// children.vue
<template>
	<div>
		// 通过按钮点击事件将子组件的值传给父组件
	    <button @click="sendtoParent">Click this Button</button>
	</div>
</template>
<script>
export default {
  props: ['sendmessage'],
  methods: {
  	sendtoParent() {
  		//$emit括号里的第一个参数为自定义事件
  		this.$emit('showMsg','子组件通过$emit给父组件传值')
  	}
  }
}
</script>