<template>
 <div id="father">
 {{ '我是父組件' }}
 <son :text = "text"></son>
 </div>
</template>
<script>
import son from './son.vue'
export default {
 data: function () {
 return {
 text: '從父組件傳來的數(shù)據(jù)'
 }
 },
 components: {
 son: son
 }
}
</script>
<style scoped>
</style> 

<template>
 <div>
 {{ '我是子組件，我接收了' + text }}
 </div>
</template>
<script>
export default {
 props: {
 text: { type: String, default: '' }
 }
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
</style>

<template>
 <div id="father">
 {{ '我是父組件,名稱是' + componentName }}
 <son :changeComponentName = "changeComponentName"></son>
 </div>
</template>
<script>
import son from './son.vue'
export default {
 data: function () {
 return {
 componentName: '組件A'
 }
 },
 methods: {
 changeComponentName: function (newComponentName) {
 this.componentName = newComponentName
 }
 },
 components: {
 son: son
 }
}
</script>
<style scoped>
 #father div{
 padding: 10px;
 margin: 10px;
 border: 1px solid gray;
 }
</style> 

<template>
 <div>
 <p>我是子組件：一個(gè)button</p>
 <button @click="() => changeComponentName(newComponentName)">
 把父組件的名稱修改為：彭湖灣的組件
 </button>
 </div>
</template>
<script>
export default {
 data: function () {
 return {
 newComponentName: '彭湖灣的組件'
 }
 },
 props: {
 changeComponentName: {
 type: Function,
 default: () => { }
 }
 }
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
</style>

<template>
 <div id="father">
 <div>
 {{ '我是父組件,我的名稱是:' + fatherComponentName }}
 <son v-on:changeComponentName = "changeComponentName"></son>
 </div>
 </div>
</template>
<script>
import son from './son.vue'
export default {
 data: function () {
 return {
 fatherComponentName: 'A組件'
 }
 },
 methods: {
 changeComponentName: function (componentName) {
 this.fatherComponentName = componentName
 }
 },
 components: {
 son: son
 }
}
</script>
<style scoped>
 #father div{
 padding: 10px;
 margin: 10px;
 border:1px solid grey;
 }
</style>

<template>
 <div>
 <p>我是子組件:一個(gè)按鈕</p>
 <button @click="clickCallback">
 修改父組件的名稱為：彭湖灣的組件
 </button>
 </div>
</template>
<script>
export default {
 data: function () {
 return {
 fatherComponentName: '彭湖灣的組件'
 }
 },
 methods: {
 clickCallback: function () {
 this.$emit('changeComponentName', this.fatherComponentName)
 }
 }
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
</style>

<template>
 <div id="father">
 <div>
 {{ '我是父組件:father' }}
 <eldest-son :text = "text"></eldest-son>
 <youngest-son :changeText="changeText"></youngest-son>
 </div>
 </div> 
</template>
<script>
import eldestSon from './eldestSon.vue'
import youngestSon from './youngestSon.vue'
export default {
 data: function () {
 return {
 text: '我是一行文本'
 }
 },
 methods: {
 changeText: function () {
 this.text = '我是經(jīng)過改動(dòng)的一行文本'
 }
 },
 components: {
 eldestSon: eldestSon,
 youngestSon: youngestSon
 }
}
</script>
<style>
 #father div{
 border: 1px solid grey;
 padding: 10px;
 margin: 10px;
 }
</style>

<template>
 <div>
 <p>我是兄弟組件：eldestSon</p>
 <p>我有一個(gè)可變數(shù)據(jù)text：{{ text }}</p>
 </div>
</template>
<script>
export default {
 props: {
 text: {
 type: String,
 default: ''
 }
 }
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
</style>

<template>
 <div>
 <p>我是兄弟組件：youngestSon</p>
 <button @click="changeText">更改eldestSon兄弟組件中的文本</button>
 </div>
</template>
<script>
export default {
 props: {
 changeText: {
 type: Function,
 default: () => {}
 }
 }
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
</style>