Utilizing Functions from Another Component in Angular 2

Question

Utilizing Functions from Another Component in Angular 2

Picture a scenario where we have 3 components, and one of them contains a function that I need to access in the other components. These components are all at the same level (siblings).

file1.ts
export class ComponentWithFunction() {
    function getData() {
        console.log('data has been fetched');
    }
}

file2.ts
export class ComponentA() {
    // here I want to be able to utilize getData
}

file3.ts
export class ComponentB() {
    // here I want to be able to utilize getData
}

How can I access the getData function from another component? I am aware that I could create a SharedService and Inject it into the specified components, but is there an alternative method such as using static functions or something similar?

Appreciate your help

javascript angular typescript

Answer 1

Answer №1

Importance of Using Services in Angular 2 According to Angular 2, it is advisable to utilize services for data retrieval as isolating data access into a separate service helps in keeping the component focused and lightweight, primarily catering to the view. Additionally, employing a separate service makes unit testing of components easier when using a mock service.

To implement this approach, you can encapsulate the function in a service and then inject that particular service in each relevant Component where the said function is required.

The next step involves adding the service to the providers list of the app module and implementing injection in constructors like below:

file1.ts

@Injectable()
export class ComponentWithFunction() {
    function getData() {
        console.log('data has been fetched');
    }
}

file2.ts
export class ComponentA() {
    constructor(private service: ComponentWithFunction)
}

file3.ts
export class ComponentB() {
    constructor(private service: ComponentWithFunction)
}

For further details, refer to Service in Angular 2.

Answer 2

Importance of Using Services in Angular 2 According to Angular 2, it is advisable to utilize services for data retrieval as isolating data access into a separate service helps in keeping the component focused and lightweight, primarily catering to the view. Additionally, employing a separate service makes unit testing of components easier when using a mock service.

To implement this approach, you can encapsulate the function in a service and then inject that particular service in each relevant Component where the said function is required.

The next step involves adding the service to the providers list of the app module and implementing injection in constructors like below:

file1.ts

@Injectable()
export class ComponentWithFunction() {
    function getData() {
        console.log('data has been fetched');
    }
}

file2.ts
export class ComponentA() {
    constructor(private service: ComponentWithFunction)
}

file3.ts
export class ComponentB() {
    constructor(private service: ComponentWithFunction)
}

For further details, refer to Service in Angular 2.

Answer 3

Answer №2

Perhaps we can consider a different scenario.

Imagine I have a Widget that controls the display of a Pop-up on a webpage. The Widget contains functionality such as opening, closing, and refreshing the Pop-up.

If I am not mistaken, in order to access the open() or close() functions from another Widget, would I need to create the Pop-up as a service and inject it into all the areas where I wish to utilize it? Is there no possibility to subscribe to events or methods directly from the Pop-up itself?

Answer 4

Perhaps we can consider a different scenario.

Imagine I have a Widget that controls the display of a Pop-up on a webpage. The Widget contains functionality such as opening, closing, and refreshing the Pop-up.

If I am not mistaken, in order to access the open() or close() functions from another Widget, would I need to create the Pop-up as a service and inject it into all the areas where I wish to utilize it? Is there no possibility to subscribe to events or methods directly from the Pop-up itself?

Utilizing Functions from Another Component in Angular 2

Answer №1

Answer №2

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