35 lines
1.4 KiB
Plaintext
35 lines
1.4 KiB
Plaintext
import { OperatorFunction, TimestampProvider, Timestamp } from '../types';
|
|
/**
|
|
* Attaches a timestamp to each item emitted by an observable indicating when it was emitted
|
|
*
|
|
* The `timestamp` operator maps the *source* observable stream to an object of type
|
|
* `{value: T, timestamp: R}`. The properties are generically typed. The `value` property contains the value
|
|
* and type of the *source* observable. The `timestamp` is generated by the schedulers `now` function. By
|
|
* default, it uses the `asyncScheduler` which simply returns `Date.now()` (milliseconds since 1970/01/01
|
|
* 00:00:00:000) and therefore is of type `number`.
|
|
*
|
|
* 
|
|
*
|
|
* ## Example
|
|
*
|
|
* In this example there is a timestamp attached to the document's click events
|
|
*
|
|
* ```ts
|
|
* import { fromEvent, timestamp } from 'rxjs';
|
|
*
|
|
* const clickWithTimestamp = fromEvent(document, 'click').pipe(
|
|
* timestamp()
|
|
* );
|
|
*
|
|
* // Emits data of type { value: PointerEvent, timestamp: number }
|
|
* clickWithTimestamp.subscribe(data => {
|
|
* console.log(data);
|
|
* });
|
|
* ```
|
|
*
|
|
* @param timestampProvider An object with a `now()` method used to get the current timestamp.
|
|
* @return A function that returns an Observable that attaches a timestamp to
|
|
* each item emitted by the source Observable indicating when it was emitted.
|
|
*/
|
|
export declare function timestamp<T>(timestampProvider?: TimestampProvider): OperatorFunction<T, Timestamp<T>>;
|
|
//# sourceMappingURL=timestamp.d.ts.map |