<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
<div id="app">
<comp> </comp>
</div>
<template id="comp">
<div id="">
<p>{{message}}</p>
<button type="button" @click="parent">获取父</button>
<button type="button" @click="root">获取根</button>
</div>
</template>
<script>
// 子组件
const comp = Vue.extend({
template: '#comp',
data() {
return {
message: 'Hello furong!',
}
},
methods: {
// 两个均不常用
parent() {
console.log(this.$parent.message);
},
root() {
console.log(this.$root.message);
}
}
})
// root
const app = new Vue({
el: '#app',
data: {
message: 'Hello Vue.js!',
},
components: {
comp,
},
})
</script>
</body>
</html>
