how to use the debouncetime function from the rxjs library in javascript

The debounceTime function in the rxjs library is used to delay emitting values from an observable stream until a specified amount of time passes without any new values being emitted. This can be useful for preventing unnecessary updates or API calls, for example.

To use debounceTime in JavaScript, first you need to import it from the rxjs/operators module:

index.tsx
import { debounceTime } from 'rxjs/operators';
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Then you can apply it to an observable stream using the pipe() method:

index.tsx
import { fromEvent } from 'rxjs';
import { debounceTime } from 'rxjs/operators';

const inputElement = document.querySelector('input');

const inputObservable = fromEvent(inputElement, 'input');

inputObservable
  .pipe(debounceTime(500))
  .subscribe(event => {
    // do something with the input value
  });
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In this example, we create an observable stream from the 'input' events on an HTML input element using the fromEvent function. We then apply the debounceTime function with a delay of 500 milliseconds using the pipe method, and subscribe to the resulting observable to receive the debounced input values.

By using debounceTime, we ensure that the subscription callback is only called once every 500 milliseconds at most, even if the input element emits multiple events within that time frame.