Suggest an editImprove this articleRefine the answer for “How does a component receive dependencies through the constructor?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**Dependency Injection (DI)** through the constructor is the mechanism by which an Angular component receives dependencies: the types of required services are declared as constructor parameters, and Angular's injector creates or reuses an existing instance. **Key point:** Angular automatically creates and injects service instances through the constructor, freeing the developer from manually creating dependencies.Shown above the full answer for quick recall.Answer (EN)ImageIn Angular, a component receives dependencies through **Dependency Injection (DI)**, by passing them into the class **constructor**. ## How it works 1. Parameters with the types of the services the component needs are added to the component's constructor. 2. Angular checks the **injector** (module or component), looks for the matching service, and creates an instance of it (or takes an existing one). 3. After that, the service becomes available in the component through the property defined in the constructor. Example: ```typescript import { Component } from '@angular/core'; import { DataService } from './data.service'; @Component({ selector: 'app-example', template: `<p>{{ data }}</p>` }) export class ExampleComponent { data: string; constructor(private dataService: DataService) { this.data = this.dataService.getData(); } } ``` > Conclusion: Angular automatically creates and injects service instances through the constructor, freeing the developer from manually creating dependencies.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.