<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<!-- 組件實例對象 -->
<div id="app">
<cpn :cmovies='movies' :cmessage='message'></cpn>
</div>
<template id="cpn">
<div>
<!-- <p>{{cmovies}}</p> -->
<li v-for='item in cmovies'>{{item}}</li>
<h2>{{cmessage}}</h2>
</div>
</template>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
// 父傳子：props
const cpn = {
template: '#cpn',
// props: ['cmovies','cmessage'],
props: {
// 1.類型限制
// cmovies: Array,
// cmessage: String,
// 2.提供一些默認值
cmessage:{
type: String,
default: 'aaa',
required: true, // 加該屬性則為必傳值，不傳報錯
},
// 類型是對象或者數組時，默認值必須是一個函數
cmovies: {
type: Array,
// default: [] // vue 2.5.17以下
default(){
return []
}
}
},
data(){
return {}
},
methods: {
}
}
const app = new Vue({
el: '#app',
data: {
message: '你好啊',
movies: ['海王', '話賊王', '七天達式' ]
},
components: {
cpn
}
})
</script>
</body>
</html>
