typescript 如何在具有类型安全性的同一组件上实现 OnInit 和 OnChanges
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How to implement OnInit and OnChanges on same component with type safety
提问by hholtij
One of the things I like about typescript is its type safety and I use it consistently.
我喜欢打字稿的一件事是它的类型安全，我一直在使用它。
Typescript does not support multiple inheritance, so how can I extend an Angular 2 component class by OnInitand OnChangesat the same time?
打字稿不支持多重继承，所以我怎么能由延长的2个组件类OnInit，并OnChanges在同一时间？
I know that it works without declaring the inheritance but I like my code without squiggly lines.
我知道它可以在不声明继承的情况下工作，但我喜欢我的代码没有波浪线。
回答by Blackus
OnInitand OnChangesare not classes but interfaces, so your components don't inherit but implementthose interfaces.
OnInit并且OnChanges不是类而是接口，因此您的组件不会继承而是实现这些接口。
As a class can implements as many interfaces as it needs, there is no problem implementing both OnInitand OnChangesinterfaces on the same component.
由于一个类可以实现任意数量的接口，因此在同一个组件上实现OnInit和OnChanges接口没有问题。
For example:
例如：
class FooComponent implements OnInit, OnChanges {
}
For more information, have a look at Angular Lifecycle Hooks guide.
有关更多信息，请查看Angular Lifecycle Hooks 指南。
