The function you are trying to access in Typescript X does not exist

I am facing an issue with my code. Although there are no errors during compilation, I encounter a console error stating: 'this.trackArray[0].points.getVector() is not a function.'

Below is the snippet where I invoke this function:

const vecteurPoints: THREE.Vector3[] = this.trackArray[0].points.getVector();

The function implementation is as follows:

public getVector(): Vector3[] {
    const vecArray: Vector3[] = new Array();
    for (const i of this.coordX) {
        vecArray[i].x = this.coordX[i];
        vecArray[i].y = this.coordY[i];
        vecArray[i].z = this.coordZ[i];
    }

    return vecArray;
}

In VS Code, I can navigate to the function definition by ctrl+clicking on it.

The trackArray is obtained through an API call.

export class AdminService {
    public constructor( private http: HttpClient ) {  }

    public getTracks(): Observable<Track[]> {
        return this.http.get<Track[]>(this.ADMIN_URL).pipe(catchError(this.handleError<Track[]>("getTracks"))
        );
 }

To call this class, I use the following method:

 this.admin.getTracks().subscribe((track: Track[]) => {this.trackArray = track; });

Answer №1

After receiving the trackArray in JSON format, I realized that I needed to create a new track instance in order to implement my method successfully. I greatly appreciate everyone's assistance in resolving this issue.

Answer №2

If there are no elements in the this.trackArray, this issue could occur. Ensure to add a null check before accessing the elements.

if(this.trackArray && this.trackArray[0]){
  const vecteurPoints: THREE.Vector3[] = this.trackArray[0].points.getVector();
}

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