Javascript 将回调函数添加到下划线

我正在使用underline.js的u.invoke（）销毁一个集合，下面是代码：

 _.invoke(Labels.selectedItems(), 'destroy', {
   error : function (model, response, options) {
     self.isFailed = true; // initialized with false
     utilities.activateNotification("error", "Deleting label failed", response);
   }
 });

---

在所有销毁函数完成后，如何添加回调函数（或其他机制？）来检查isFailed的值？

我认为您最好看看解决此问题的承诺

但是，这里有一个下划线解决方案，它利用了函数：

// function will be called after it has been called as many times as there are items
var allDone = _.after(Labels.selectedItems().length, function(){
    console.log('The end');
})

// sample destroy function which calls allDone
var destroy = function(params){
    ....
    allDone();
}