Advantages of creating model classes in Angular 2 and above

When developing a service for my domain, I discovered that I could easily implement the service using any type like this:

list(): Observable<any> {
    const url = this.appUrlApi + this.serviceUrlApi;
    return this.http.get(url, { headers: this.header });
  }

add(item: any): Observable<any> {
    const url = this.appUrlApi + this.serviceUrlApi;
    return this.http.post(url, item, { headers: this.header });
  }

Instead of explicitly stating the Class like this:

list(): Observable<Car[]> {
const url = this.appUrlApi + this.serviceUrlApi;
return this.http.get(url, { headers: this.header });
  }

add(item: Car): Observable<any> {
    const url = this.appUrlApi + this.serviceUrlApi;
    return this.http.post(url, item, { headers: this.header });
  }

I understand that the second approach is the correct way and a better method (although the first way can save time by requiring fewer files and no commitment to properties), but what exactly are the benefits of defining model classes and their properties in Angular? It was meant to keep the Model as simple as possible in MVC.

Answer №1

Essentially, your inquiry is about the significance of employing strong typing, which extends beyond just Angular.

In essence: scalability. As a program grows larger, the chances of errors also increase. Types help in narrowing down potential issues and identifying mistakes more efficiently.

Answer №2

One benefit that stands out is the ease of debugging. It allows you to quickly identify when a double variable has been unintentionally filled with a String value.

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