<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div id="app">
        <reg></reg>
    </div>

    <script src="../js/vue.js"></script>

    <script>
        Vue.component('reg',{
            template:'<h4>注册</h4>'
        });

        const vm = new Vue({
            el:'#app'
        })
    </script>
</body>
</html>