vue绑定事件

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

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <input type="button" value="click" v-on:click="doIt">
        <input type="button" value="简写click" @click="doIt">
        <span @click="changeName" v-text="name"></span>
        <h2>{{ name }}</h2>
    </div>

    <script src="vue.js"></script>
    <script>
        var app = new Vue({
            el: "#app",
            methods: {
                doIt: function () {
                    alert(123);
                },
                changeName: function () {
                    // console.log(this.name);
                    this.name += 'nb';
                }
            },
            data: {
                name: "ajupyter",
            }

        })
    </script>
</body>

</html>