<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单绑定number修饰符</title>
</head>
<body>
    <div id="app">
        <input type="number" v-model.number="age">
        <p>{{age}}</p>
    </div>

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

    <script>
        let vm = new Vue({
            el:'#app',
            data:{
                age:0
            },
            watch:{
                age:function () {
                    console.log(typeof(this.age));
                }
            }
        });
    </script>
</body>
</html>