Untitled

<body>
    <div id="app">
        男<input type="radio" name="sex" value="男" v-model="sex">
        女<input type="radio" name="sex" value="女" v-model="sex">
        <br>
        {{sex}}
    </div>
</body>


<script>
    var vm = new Vue({
        el: '#app',
        data: {
            sex: ''
        }
    });
</script>