类型 'Subject<T>' 中的 属性 'lift' 不可分配给基本类型 'Observable<T>' 中的相同 属性

Question

我在 Subject.d.ts 文件中收到有关 属性 lift 的错误，但不确定如何更正它。我正在使用 RxJS 版本 5.0.1.

Error   TS2416  (TS) Property 'lift' in type 'Subject<T>' is not assignable to the same property in base type 'Observable<T>'.
  Type '<R>(operator: Operator<T, R>) => Observable<T>' is not assignable to type '<R>(operator: Operator<T, R>) => Observable<R>'.
    Type 'Observable<T>' is not assignable to type 'Observable<R>'.
      Type 'T' is not assignable to type 'R'.
        'R' could be instantiated with an arbitrary type which could be unrelated to 'T'.

/**
 * @class Subject<T>
 */
export declare class Subject<T> extends Observable<T> implements ISubscription {
    observers: Observer<T>[];
    closed: boolean;
    isStopped: boolean;
    hasError: boolean;
    thrownError: any;
    constructor();
    static create: Function;
    lift<R>(operator: Operator<T, R>): Observable<T>;
    next(value?: T): void;
    error(err: any): void;
    complete(): void;
    unsubscribe(): void;
    protected _subscribe(subscriber: Subscriber<T>): Subscription;
    asObservable(): Observable<T>;
}

Answer 1

RxJS 类型中的签名不正确并得到 fixed in v5.4.2: https://github.com/ReactiveX/rxjs/pull/2722/files。

因此解决方案是更新到 rxjs@5.4.2。