TypeScript class with async constructor causing initialization issues in Angular services
I'm sure I'm missing something obvious here, but I'm sure I'm missing something obvious here, but I'm testing a new approach and I'm following best practices but I'm running into a question with a TypeScript class that has an async constructor, specifically when using it in an Angular service... The goal of my service is to fetch some initial data before the class instance can be fully utilized, but I'm working with issues with resolution timing. Here's an example of what I'm trying to do: ```typescript class DataService { public data: any; constructor(private http: HttpClient) { this.initializeData(); } private async initializeData() { this.data = await this.http.get('https://api.example.com/data').toPromise(); } } ``` I've tried calling `initializeData` during the construction, but it seems like the data isn't available when I try to access it right after the class is instantiated. For instance: ```typescript const service = new DataService(http); console.log(service.data); // logs undefined ``` I also explored using a factory function for the service to manage the async initialization, but that seems to complicate the dependency injection pattern in Angular. The behavior I'm seeing is similar to "want to read property '...' of undefined" when I try to access `service.data` immediately after instantiation. Is there a recommended approach for handling async initialization in TypeScript classes used as Angular services? Should I be using observables instead of async/await for this scenario? Any best practices on structuring this to ensure that the data is available when needed would be greatly appreciated! What are your experiences with this? Could someone point me to the right documentation? What would be the recommended way to handle this? I'm coming from a different tech stack and learning Typescript.