vue2.0 computed和v-bind:class

    
@{{todoCount}}
 {{--实时计算computed--}}
    

        
@{{todo.title}} {{--v-bind:class completed为true改变为顶部style的样式--}}
            {{--按钮绑定toggleCompletion(todo)事件--}}
            @{{todo.completed ? 'undo' : 'completed'}}
            delete
        
    

    

        
        add