<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>错误的用法</title>
</head>
<body>
    <div id="app">
        {{sayHello()}}
    </div>

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

    <script>
        let user = {
            name:'liu',
            city:'beijing'
        };

        let vm = new Vue({
            el:'#app',
            data:user,
            methods:{
                sayHello:()=> `欢迎来自${this.city}的${this.name}!`
            }
        });

        /*
        箭头函数不是绑定的自己的this指针，实际上是windows对象

         */
    </script>
</body>
</html>