使用rxjs @ 5,我们实现了一个方便的DisposeBag类来收集Subscriptions,并在销毁Angular组件时更容易取消订阅。
import { Subscription } from "rxjs/Subscription";
export class DisposeBag {
private _subscription: Subscription[] = [];
insert(subscription: Subscription): void {
this._subscription.push(subscription);
}
dispose() {
this._subscription.forEach(subscription => {
subscription.unsubscribe();
});
this._subscription = [];
}
}
export function disposedBy(this: Subscription, bag: DisposeBag): void {
bag.insert(this);
}
Subscription.prototype.disposedBy = disposedBy;
declare module "rxjs/Subscription" {
interface Subscription {
disposedBy: typeof disposedBy;
}
}
升级到rxjs @ 6 + rxjs-compat @ 6,我们得到以下编译错误:
(12) Property 'unsubscribe' does not exist on type 'Subscription'.
(22) 'Subscription' only refers to a type, but is being used as a value here.
将第一次导入切换为
import { Subscription } from "rxjs";
解决了这两个错误但引入了(22) Property 'disposedBy' does not exist on type 'Subscription'.
错误。
我们该如何解决这个问题?
感谢this的回答,我能够解决这个问题:
import { Subscription } from "rxjs";
export class DisposeBag {
private _subscription: Subscription[] = [];
insert(subscription: Subscription): void {
this._subscription.push(subscription);
}
dispose() {
this._subscription.forEach(subscription => {
subscription.unsubscribe();
});
this._subscription = [];
}
}
export function disposedBy(this: Subscription, bag: DisposeBag): void {
bag.insert(this);
}
Subscription.prototype.disposedBy = disposedBy;
declare module "rxjs/internal/Subscription" {
interface Subscription {
disposedBy: typeof disposedBy;
}
}