今天想起一直没有记录父组件与子组件的传参问题，这在项目中一直用到。

父向子组件传参

Index.vue父组件中

     import componentA from './components/componentA'

export default{name:'Index',data(){return{positionnow:''}}}

　　

componentA.vue子组件中

{
    {msgfromfa}}
export default{props:['msgfromfa']}

子向父组件传参

Index.vue父组件中

Do you like me? {
    {childWords}}
     

import componentA from './components/componentA'export default {new Vue({data: function () {return {childWords: ""}},components: {componentA},methods: {listenToMyBoy: function (msg){this.childWords = msg}}})}

componentA.vue子组件中

like!

import componentA from './components/componentA'export default {data: function () {return {msg: 'I like you!'}},methods: {onClickMe: function(){this.$emit('child-say',this.msg);}}}