How to use switchMap to handle dependent HTTP requests in RxJS

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With the help of code can you tell me How to use switchMap to handle dependent HTTP requests in RxJS?
3 days ago in Node-js by Ashutosh
• 23,230 points
34 views

1 answer to this question.

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Using switchMap for Dependent HTTP Requests in RxJS

The switchMap operator is ideal for handling dependent HTTP requests where you need to:

Make an initial request

Use its response to make a subsequent request

Cancel the previous inner observable if a new outer value arrives

Basic Usage

import { switchMap } from 'rxjs/operators';

import { from } from 'rxjs';

firstRequest().pipe(

  switchMap(firstResponse => {

    return secondRequest(firstResponse.id);

  })

).subscribe(secondResponse => {

});

answered 3 days ago by anonymous

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