等待http请求完成，然后在角度6的另一个http请求中使用结果

Question

i have to make 2 http requests, the second one depends on the first one's result. How to make it possible ? I tried subscribe and map, but not working. Thank you for yor time

Answer 1

hard to show you without your own code but it would look something like this:

this.request1().pipe(
  switchMap(result1 => this.request2(result1.neededProp))
).subscribe(result2 => console.log(result2))

switchmap takes the value from 1 observable response and switches into another observable.