$emit传递一个参数时

//子组件代码
let data = {name:'王五',age:'50'};
this.$emit('change',data)

//父组件代码
<editable-cell @change="onCellChange($event)" />
onCellChange(backMsg) {
	this.msg = backMsg;
}

$emit传递多个参数时

//子组件代码
let data = {name:'王五',age:'50'};
let type = '5'
this.$emit('change',data,type)

//父组件代码如下
<editable-cell @change="onCellChange(arguments)" />
//arguments 是关键字
onCellChange(backMsg) {
	this.data = backMsg[0]; //{name:'王五',age:'50'}
	this.type = backMsg[1];	//5
}

通过$emit 实现子组件向父组件通信