Why ngOnInit is not called in Angular service when injected?

Hi! I'm new to Angular and TypeScript, and I've encountered a strange problem. I have a service that should perform some initialization when created. I decided to use Angular hooks, specifically `ngOnInit`, so that this code would run automatically. But it doesn't work — the `ngOnInit` method is simply not called. Here is my code: ```typescript import { Injectable, OnInit } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class DataService implements OnInit { public data: any[] = []; constructor() { console.log('Constructor called'); } ngOnInit(): void { console.log('ngOnInit called'); this.data = ['item1', 'item2']; } } ``` I expect that when the service is injected into a component, `ngOnInit` will be called automatically, but in the co