<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <cpn> <button>按钮</button></cpn>
        <cpn> <span>哈哈哈</span></cpn>
        <cpn><span slot="left">标题</span></cpn>
        <cpn></cpn>
    </div>
    <template id="cpn">
        <div>
            <h2>我是组件</h2>
            <p>我是组件 哈哈哈</p>
           
            <slot name="left"><span>左边</span></slot>
            <slot name="center"><span>中间</span></slot>
            <slot name="right"><span>右边</span></slot>
            
        </div>
    </template>
    <script src="./js/vue.js"></script>
    <script>
        const cpn = Vue.extend({
            template: `#cpn`
        })
        const app = new Vue({
            el: '#app',
            data() {
                return {
                    message: 'geyao'
                }
            },
            components: {
                cpn: cpn
            }
        })
    </script>
</body>

</html>

运行结果