Using Services in Angular 11: A Guide to Implementing Services in Regular Typescript Files

Question

Using Services in Angular 11: A Guide to Implementing Services in Regular Typescript Files

I'm working with a utils.ts file that contains exported functions like deepCopy and sortArray. However, I need to use a service within some of these functions. How can I go about incorporating a service, such as toastService, into my utils.ts file?

// utils.ts
export function copy(str:string){
  // set clipBoard...
  
  // Here I need to utilize a service, specifically how can I use toastService?
  // toastService.success('copied!');
}

angular typescript

Answer 1

Answer №1

It seems like the best approach for you would be to transform your utility function into a method within a service and utilize it across your application just like any other service.

@Injectable({
  providedIn: 'root'
})
export class HelperService {
  constructor(
    private toastService: ToastService,
  ){}

  public copy(str:string): void{
     // set clipBoard...

     // Here, I intend to utilize a service. How can I make use of the toastService?
     this.toastService.success('copied!');
  }
}

You can implement it in this manner:

this.helperService.copy('Something');

This is the recommended approach as you will be able to access ToastService through dependency injection and the @Injectable decorator will handle it for you.

Answer 2

It seems like the best approach for you would be to transform your utility function into a method within a service and utilize it across your application just like any other service.

@Injectable({
  providedIn: 'root'
})
export class HelperService {
  constructor(
    private toastService: ToastService,
  ){}

  public copy(str:string): void{
     // set clipBoard...

     // Here, I intend to utilize a service. How can I make use of the toastService?
     this.toastService.success('copied!');
  }
}

You can implement it in this manner:

this.helperService.copy('Something');

This is the recommended approach as you will be able to access ToastService through dependency injection and the @Injectable decorator will handle it for you.

Answer 3

Answer №2

Instead of creating a new instance of ToastService in your function, it is advisable to avoid that approach to retain all the benefits of DI.

You could consider the following alternative approach:

export function copy(str:string){
  // set clipBoard...
  
  const toastService = new ToastService();
  toastService.success('copied!');
}

It is recommended to either convert your utils into a service, as suggested by others (which is the optimal solution), or extract common code into another function (if feasible) and utilize it in both instances. This could be implemented as follows:

shared.utils.ts:

export function toastSuccess(message: string) {
  // your logic
}

toast.service.ts

import {toastSuccess} from './shared.utils';

@Injectable({providedIn: 'root'})
export class ToastService {
  success(message: string) {
    toastSuccess(message);
  }
}

utils.ts

import {toastSuccess} from './shared.utils';

export function copy(str:string){
  // set clipBoard...

  toastSuccess('copied!');
}

Answer 4

Instead of creating a new instance of ToastService in your function, it is advisable to avoid that approach to retain all the benefits of DI.

You could consider the following alternative approach:

export function copy(str:string){
  // set clipBoard...
  
  const toastService = new ToastService();
  toastService.success('copied!');
}

It is recommended to either convert your utils into a service, as suggested by others (which is the optimal solution), or extract common code into another function (if feasible) and utilize it in both instances. This could be implemented as follows:

shared.utils.ts:

export function toastSuccess(message: string) {
  // your logic
}

toast.service.ts

import {toastSuccess} from './shared.utils';

@Injectable({providedIn: 'root'})
export class ToastService {
  success(message: string) {
    toastSuccess(message);
  }
}

utils.ts

import {toastSuccess} from './shared.utils';

export function copy(str:string){
  // set clipBoard...

  toastSuccess('copied!');
}

Using Services in Angular 11: A Guide to Implementing Services in Regular Typescript Files

Answer №1

Answer №2

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