vue自定义组件 nVcs

<div id="app">  
    <add></add>  
    <del></del>  
</div>  
<script>  
    var vm = new Vue({  
        el: '#app',  
        components: {  
            "add": {  
                template: "<button>btn：{{btn}}</button>",  
                data: function () {  
                    return {btn: "123"};  
                }  
            },  
            del: {  
                template: "<button>btn：{{btn}}</button>",  
                data: function () {  
                    return {btn: "456"};  
                }  
            }  
        }  
    });  
</script>