父子组件的访问方式： $children、$refs
父子组件的访问方式： $children
父子组件的访问方式： $refs
组件访问-父访问子-children-refs.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<cpn></cpn>
<cpn></cpn>
<my-cpn></my-cpn>
<y-cpn></y-cpn>
<cpn ref="aaa"></cpn>
<button @click="btnClick">按钮</button>
</div>
<template id="cpn">
<div>我是子组件</div>
</template>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊'
},
methods: {
btnClick() {
// 1.$children
// console.log(this.$children);
// for (let c of this.$children) {
// console.log(c.name);
// c.showMessage();
// }
// console.log(this.$children[3].name);
// 2.$refs => 对象类型, 默认是一个空的对象，ref='bbb' 【以对象结构保存所有子组件】
console.log(this.$refs.aaa.name);
}
},
components: {
cpn: {
template: '#cpn',
data() {
return {
name: '我是子组件的name'
}
},
methods: {
showMessage() {
console.log('showMessage');
}
}
},
}
})
</script>
</body>
</html>
父子组件的访问方式： $parent
组件访问-子访问父-parent-root
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<cpn></cpn>
</div>
<template id="cpn">
<div>
<h2>我是cpn组件</h2>
<ccpn></ccpn>
</div>
</template>
<template id="ccpn">
<div>
<h2>我是子组件</h2>
<button @click="btnClick">按钮</button>
</div>
</template>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: '你好啊'
},
components: {
cpn: {
template: '#cpn',
data() {
return {
name: '我是cpn组件的name'
}
},
components: {
ccpn: {
template: '#ccpn',
methods: {
btnClick() {
// 1.访问父组件$parent
// console.log(this.$parent);
// console.log(this.$parent.name);
// 2.访问根组件$root
console.log(this.$root);
console.log(this.$root.message);
}
}
}
}
}
}
})
</script>
</body>
</html>