父组件传递参数给子组件，也就是子组件的数据来源于父组件，父data，子props，通过:props=data
子组件传递参数给父组件，就是是父组件的数据来源于子组件，子data，$emit（‘ccc’，item）,item为传递给父组件的数据，父：引用子组件，@ccc=methods
示例如下
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<template id="child">
<div>
我是子组件，我要给父组件传递一个参数
<button v-for="item in stuList" @click="tran()">{{item}}</button>
</div>
</template>
<div id="app">
{{message}}
<child @paclick='paclick'></child>
</div>
<script src="../js/vue.js"></script>
<script>
const child = {
template: '#child',
data() {
return {
stuList: ['s1','s2','s3','s4']
}
},
methods: {
tran(){
console.log(456)
this.$emit('paclick',this.stuList)
}
}
}
new Vue({
el: '#app',
data: {
message: '大家好，我是父组件'
},
components: {
child
},
methods: {
paclick(item){
console.log(item)
}
}
})
</script>
</body>
</html>
示例2
-------------------------子--------------------------
<template>
<div>
<h1>BOOK的天下</h1>
<h2>{{messageprops}}</h2>
<button @click="goto()">传递给父</button>
</div>
</template>
<script>
export default {
name: 'book',
props:{
messageprops: {
type:String,
}
},
data() {
return {
stuList: ['s1','s2','s3','s4','s5']
}
},
methods:{
goto(){
this.$emit('clickck',this.stuList)
}
}
}
</script>
<style>
</style>
--------------------------父----------------------
<template>
<div>
<Book :messageprops='haha' @clickck='clickckll'></Book>
</div>
</template>
<script>
import Book from './book'
export default {
name: 'bookFather',
data() {
return {
haha: '你好啊'
}
},
methods:{
clickckll(item){
console.log(item)
}
},
components:{
Book
}
}
</script>
<style>
</style>
