父子组件:其实就是在父组件的内部的components属性中,注册组件,然后切记父组件中调用子组件😏

<div id="app">
<mycpn2></mycpn2>
</div>
<script>
const cpn = Vue.extend({
template: `
<div>
<h2>Hello world</h2>
<p>你好,世界</p>
</div>
`
})
const cpn2 = Vue.extend({
template: `
<div>
<h2>Hello world2</h2>
<p>你好,世界2</p>
<mycpn1></mycpn1>
</div>
`,
components: {
mycpn1: cpn
}
})
var vm = new Vue({
el: '#app',
data: {},
methods: {},
components: {
mycpn2: cpn2
}
});
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