form_date.html

<!DOCTYPE html>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<html>
<head>
    <title>Latihan Moment JS dan Vue Js</title>
</head>
<body>
    <div id="app">
        <form>
        <p>form input tanggal lahir</p>
        <input type="date" name="datebirth" v-model="datebirth" v-on:change="handle_age">
        Usia anda : {{handle_age()}}
        <br>
        <span v-if="error_fields">{{error_fields}}</span>
    </form>
    </div>
</body>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="./libs/moment.js"></script>
<script src="./libs/moment-with-locales.js"></script>
</html>