Knockout.js:如何一次获得所有属性的通知 [英] knockoutjs: how to get notications for all the properties an once

问题描述

假设我有一个包含100个道具的ViewModel.当前，我需要一个处理程序，如果任何道具发生更改，则将调用该处理程序.当然，我可以为每个属性写入100 .subscribe，但似乎有更好的方法.就像在C#中一样，您可以在其中绑定到模型的PropertyChanged事件，然后通过它们的名称选择感兴趣的属性.

Suppose I have a ViewModel with 100 props. Currently I need a one handler that will be called if any of the props changes. Of course I can write 100 .subscribe for every property, but it seems, that there is a better way. Like in C#, where you can bind to PropertyChanged event of the model, and then choose properties of interest by their names.

推荐答案

一般的答案是创建一个可订阅所有内容的dependentObservable.通过在dependentObservable内部执行ko.toJS(viewModel)可以轻松完成此操作，因为它将以递归方式解开所有可观察对象.您将需要注意不要将自己包括在ko.toJS调用中，否则您将陷入无限循环.

The general answer is to create a dependentObservable that subscribes to everything. This can be easily accomplished by doing a ko.toJS(viewModel) inside of a dependentObservable, as it will recursively unwrap all observables. You will want to take caution to not include yourself in the ko.toJS call or you can get into an infinite loop.

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