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06-双向数据绑定.html

<!DOCTYPE html>
<html lang="zh-CN">

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

<body>
    <div id="app">
        <span>用户名：</span>
        <input v-model='a' type="text">
        <span>密码：</span>
        <input v-model='b' type="text">
        <button @click='up'>提交</button>
        <span>{{msg}}</span>
    </div>
    <script src="./js/vue.js"></script>
    <script>
        const vm = new Vue({
            el: '#app',
            data: {
                a: '',
                b: '',
                msg: ''

            },
            methods: {
                up: function () {
                    if (this.a == 'nihao' && this.b == '123456') {
                        this.msg = '登录成功'
                    } else {
                        this.msg = '用户名或密码错误'
                    }
                }
            }
        })
    </script>
</body>

</html>