How to throwError of map of observable (rxjs6，ng6)

To throwError of map of observable in RxJS 6 and Angular 6, you can use the throwError operator provided by RxJS. This operator allows you to create an observable that immediately emits an error.

Here is an example of how to use throwError of map of observable in RxJS 6 and Angular 6:

1. Import the necessary operators and functions from RxJS:

import { throwError } from 'rxjs';
import { map } from 'rxjs/operators';

1. Use the throwError operator inside the map operator to create an observable that emits an error:

const source$ = of('data').pipe(
  map(() => {
    throw new Error('An error occurred');
  }),
  catchError(error => {
    // Handle the error here
    console.error('Error:', error);
    return throwError(error);
  })
);

In this example, the source$ observable emits the string 'data'. Inside the map operator, we throw a new Error to simulate an error occurring. Then, we catch the error using the catchError operator and log it to the console. Finally, we use throwError to create a new observable that emits the error.

Please note that this example assumes you have already imported the necessary operators and functions from RxJS and have set up the necessary error handling logic.

As for recommended Tencent Cloud products related to this topic, you can consider using Tencent Cloud's Serverless Cloud Function (SCF) service for serverless computing, Tencent Cloud's Cloud Database (CDB) for database management, and Tencent Cloud's Cloud Load Balancer (CLB) for load balancing. You can find more information about these products on the Tencent Cloud official website:

• Serverless Cloud Function (SCF): Product Introduction
• Cloud Database (CDB): Product Introduction
• Cloud Load Balancer (CLB): Product Introduction

Please note that the above recommendations are based on Tencent Cloud's offerings and may not be applicable to other cloud computing providers.