Implement a function within a class

I have a core application that I deploy to various clients and customize based on their specific requirements.

Let's say there is a foundational component comprising:

component-core.html
component-core.ts

Now, a client requests customization, prompting me to create duplicate files:

client-core-component1.html
client-core-component1.ts

In the configuration file angular.json, I make the necessary adjustments:

          "fileReplacements": [
            {
              "replace": "src/components/component-core.html",
              "with": "src/components/component-core-client1.html"
            },
            {
              "replace": "src/components/component-core.ts",
              "with": "src/components/component-core-client1.ts"
            },

Subsequently, new functionalities are added, leading to code duplication across multiple client instances.

While it may seem impossible in HTML, is there a way to avoid duplicating all functions in component-core-client1.ts? Instead, could I import existing code and only add new functions as needed (utilizing just component-core-client1.html)? Or better yet, can I override functions from component-core.ts with those defined in component-core-client1.ts, falling back to the default if not present?

Explaining this request is complex, but it would greatly enhance my file organization capabilities.

Thank you

Answer №1

To implement class inheritance, follow these steps:

// Define your base component
export class BaseComponent {
    public Function1(): void {
        // Implement Function1 logic here
    }
}

// Create a client component that extends the BaseComponent
export ClientComponent extends BaseComponent {

    // Override the Function1 method from the base component
    public Function1(): void {
        super.Function1(); // Call the base component's Function1 method
        // Add any additional logic specific to the client component
    }

    // Include any client-specific functions here
    public ClientSpecificFunction(): void {
        // Implement client-specific logic here
    }
}

If the BaseComponent injects services, you must also inject them in the derived class constructor:

export class BaseComponent {
    constructor(public router: Router) {
        // Inject the router service into the base component constructor
    }
}

export ClientComponent extends BaseComponent {
    constructor(public router: Router) {
        super(router); // Call the base component constructor with the injected router service
    }
}

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