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fromEvent
signature: fromEvent(target: EventTargetLike, eventName: string, selector: function): Observable
fromEvent(target: EventTargetLike, eventName: string, selector: function): ObservableTurn event into observable sequence.
Examples
Example 1: Observable from mouse clicks
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// RxJS v6+
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import { fromEvent } from 'rxjs';
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import { map } from 'rxjs/operators';
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//create observable that emits click events
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const source = fromEvent(document, 'click');
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//map to string with given event timestamp
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const example = source.pipe(map(event => `Event time: ${event.timeStamp}`));
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//output (example): 'Event time: 7276.390000000001'
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const subscribe = example.subscribe(val => console.log(val));
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Last modified 8mo ago