Instead of using a `thisArg`, consider employing a closure when encountering problems with .pipe(map

The code I currently have is showing as deprecated. I am in need of assistance to update it, particularly the map section.

There is an issue with the map part that needs attention.

/** @deprecated Use a closure instead of a thisArg. Signatures accepting a thisArg will be removed in v8. */

public getDetails(): any 
  {
    return this.apiService.findForm().pipe(map((response: any) => {

      return response;
    },
      err => {

        return err;
      }
    ));
  }

I would greatly appreciate any help or guidance on resolving this matter. Thank you.

typescriptrxjs

Answer №1

To resolve the issue, you can separate the two arguments in the map function like so:

return this.apiService.findForm()
  .pipe(
     map((response: any) => { return response; }),
     catchError((err) => { return err; })
  )

Answer №2

After reviewing the rxjs code, it is clear that if you are not using the map function with the second signature, then this deprecation notice does not apply to your implementation.

export function map<T, R>(project: (value: T, index: number) => R): OperatorFunction<T, R>;
/** @deprecated Use a closure instead of a `thisArg`. Signatures accepting a `thisArg` will be removed in v8. */
export function map<T, R, A>(project: (this: A, value: T, index: number) => R, thisArg: A): OperatorFunction<T, R>;

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