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import { Subscriber } from './Subscriber';
import { ObservableNotification } from './types';
/**
* The {@link GlobalConfig} object for RxJS. It is used to configure things
* like how to react on unhandled errors.
*/
export declare const config: GlobalConfig;
/**
* The global configuration object for RxJS, used to configure things
* like how to react on unhandled errors. Accessible via {@link config}
* object.
*/
export interface GlobalConfig {
/**
* A registration point for unhandled errors from RxJS. These are errors that
* cannot were not handled by consuming code in the usual subscription path. For
* example, if you have this configured, and you subscribe to an observable without
* providing an error handler, errors from that subscription will end up here. This
* will _always_ be called asynchronously on another job in the runtime. This is because
* we do not want errors thrown in this user-configured handler to interfere with the
* behavior of the library.
*/
onUnhandledError: ((err: any) => void) | null;
/**
* A registration point for notifications that cannot be sent to subscribers because they
* have completed, errored or have been explicitly unsubscribed. By default, next, complete
* and error notifications sent to stopped subscribers are noops. However, sometimes callers
* might want a different behavior. For example, with sources that attempt to report errors
* to stopped subscribers, a caller can configure RxJS to throw an unhandled error instead.
* This will _always_ be called asynchronously on another job in the runtime. This is because
* we do not want errors thrown in this user-configured handler to interfere with the
* behavior of the library.
*/
onStoppedNotification: ((notification: ObservableNotification<any>, subscriber: Subscriber<any>) => void) | null;
/**
* The promise constructor used by default for {@link Observable#toPromise toPromise} and {@link Observable#forEach forEach}
* methods.
*
* @deprecated As of version 8, RxJS will no longer support this sort of injection of a
* Promise constructor. If you need a Promise implementation other than native promises,
* please polyfill/patch Promise as you see appropriate. Will be removed in v8.
*/
Promise?: PromiseConstructorLike;
/**
* If true, turns on synchronous error rethrowing, which is a deprecated behavior
* in v6 and higher. This behavior enables bad patterns like wrapping a subscribe
* call in a try/catch block. It also enables producer interference, a nasty bug
* where a multicast can be broken for all observers by a downstream consumer with
* an unhandled error. DO NOT USE THIS FLAG UNLESS IT'S NEEDED TO BUY TIME
* FOR MIGRATION REASONS.
*
* @deprecated As of version 8, RxJS will no longer support synchronous throwing
* of unhandled errors. All errors will be thrown on a separate call stack to prevent bad
* behaviors described above. Will be removed in v8.
*/
useDeprecatedSynchronousErrorHandling: boolean;
/**
* If true, enables an as-of-yet undocumented feature from v5: The ability to access
* `unsubscribe()` via `this` context in `next` functions created in observers passed
* to `subscribe`.
*
* This is being removed because the performance was severely problematic, and it could also cause
* issues when types other than POJOs are passed to subscribe as subscribers, as they will likely have
* their `this` context overwritten.
*
* @deprecated As of version 8, RxJS will no longer support altering the
* context of next functions provided as part of an observer to Subscribe. Instead,
* you will have access to a subscription or a signal or token that will allow you to do things like
* unsubscribe and test closed status. Will be removed in v8.
*/
useDeprecatedNextContext: boolean;
}
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