Find an element by ID from another component in Angular 17

Getting an element by ID from another component in Angular can be achieved using a combination of component communication methods and DOM manipulation techniques. Here's a step-by-step approach:
- Establish Communication: Determine the most suitable communication method between the components. Options include:
- **Input/Output Decorators (@Input/@Output):** Pass the element reference or its ID as an input property to the child component.
- **ViewChild Decorator:** Inject the child component using @ViewChild and access its element reference.
- **Event Binding:** Use event binding to trigger a callback function in the parent component, passing the element reference or ID as an event argument.
- **Services:** Create a shared service that both components can access to store and retrieve the element reference or ID.
Identify the Target Element: Determine the component that contains the element you want to access and its ID.
Access the Element Reference: Based on the chosen communication method, retrieve the element reference or ID from the target component.
Manipulate the Element: Once you have the element reference, you can manipulate it using DOM manipulation techniques like
document.getElementById()
or thenativeElement
property of the ElementRef.
Here's an example using Input/Output decorators:
// ParentComponent.html
<app-child-component [elementId]="'my-element'"></app-child-component>
// ChildComponent.ts
@Input() elementId: string;
@ViewChild('myElement', { read: ElementRef<HTMLElement> }) elementRef: ElementRef;
ngOnInit() {
const element = document.getElementById(this.elementRef.nativeElement.id);
// Manipulate the element using `element`
}
Remember to import the necessary dependencies, such as ElementRef
and ViewChild
, to access the DOM elements.
Here is a step-by-step tutorial on how to get an element by ID from another component in Angular:
Step 1: Establish Communication between the Components
There are several ways to establish communication between components in Angular. For this tutorial, we will use the @ViewChild
decorator. This decorator allows you to access the child component's element reference from the parent component.
Step 2: Create a Reference to the Child Component
In the parent component, add the @ViewChild
decorator to a property that will hold a reference to the child component. Make sure to specify the read
option to get the ElementRef
of the child component's element.
import { Component, ViewChild, ElementRef } from '@angular/core';
@Component({
selector: 'app-parent',
template: `
<app-child #childComponent></app-child>
`,
})
export class ParentComponent {
@ViewChild('childComponent', { read: ElementRef<HTMLElement> }) childElementRef: ElementRef<HTMLElement>;
}
Step 3: Access the Element in the Child Component
In the child component, use the ElementRef
to access the element's native DOM element.
import { Component, ElementRef } from '@angular/core';
@Component({
selector: 'app-child',
template: `<div id="my-element">Child Component Element</div>`,
})
export class ChildComponent {
constructor(private elementRef: ElementRef<HTMLElement>) {}
ngOnInit() {
const element = this.elementRef.nativeElement;
// Manipulate the element using `element`
}
}
Step 4: Get the Element from the Parent Component
Once communication is established, you can access the child component's element from the parent component.
ngOnInit() {
const element = this.childElementRef.nativeElement.getElementById('my-element');
// Manipulate the element using `element`
}
This approach allows you to access and manipulate the element directly from the parent component.
- Author: Ahmed Bouchefra Follow @ahmedbouchefra
-
Date:
Related posts
Send File to API in Angular 17 EventEmitter Parent to Child Communication Create an Angular Material button with an icon and text Input change event in Angular 17 Find an element by ID in Angular 17 Find an element by ID from another component in Angular 17 Find duplicate objects in an array in JavaScript and Angular What is new with Angular 17 Style binding to text-decoration in Angular Remove an item from an array in Angular Remove a component in Angular Delete a component in Angular Use TypeScript enums in Angular templates Set the value of an individual reactive form fields Signal-based components in Angular 17 Angular libraries for Markdown: A comprehensive guide Angular libraries for cookies: A comprehensive guide Build an Angular 14 CRUD Example & Tutorial Angular 9 Components: Input and Output Angular 13 selectors Picture-in-Picture with JavaScript and Angular 10 Jasmine Unit Testing for Angular 12 Angular 9 Tutorial By Example: REST CRUD APIs & HTTP GET Requests with HttpClient Angular 10/9 Elements Tutorial by Example: Building Web Components Angular 10/9 Router Tutorial: Learn Routing & Navigation by Example Angular 10/9 Router CanActivate Guards and UrlTree Parsed Routes Angular 10/9 JWT Authentication Tutorial with Example Style Angular 10/9 Components with CSS and ngStyle/ngClass Directives Upload Images In TypeScript/Node & Angular 9/Ionic 5: Working with Imports, Decorators, Async/Await and FormData Angular 9/Ionic 5 Chat App: Unsubscribe from RxJS Subjects, OnDestroy/OnInit and ChangeDetectorRef Adding UI Guards, Auto-Scrolling, Auth State, Typing Indicators and File Attachments with FileReader to your Angular 9/Ionic 5 Chat App Private Chat Rooms in Angular 9/Ionic 5: Working with TypeScript Strings, Arrays, Promises, and RxJS Behavior/Replay Subjects Building a Chat App with TypeScript/Node.js, Ionic 5/Angular 9 & PubNub/Chatkit Chat Read Cursors with Angular 9/Ionic 5 Chat App: Working with TypeScript Variables/Methods & Textarea Keydown/Focusin Events Add JWT REST API Authentication to Your Node.js/TypeScript Backend with TypeORM and SQLite3 Database Building Chat App Frontend UI with JWT Auth Using Ionic 5/Angular 9 Install Angular 10 CLI with NPM and Create a New Example App with Routing Styling An Angular 10 Example App with Bootstrap 4 Navbar, Jumbotron, Tables, Forms and Cards Integrate Bootstrap 4/jQuery with Angular 10 and Styling the UI With Navbar and Table CSS Classes Angular 10/9 Tutorial and Example: Build your First Angular App Angular 9/8 ngIf Tutorial & Example Angular 10 New Features Create New Angular 9 Workspace and Application: Using Build and Serve Angular 10 Release Date: Angular 10 Will Focus on Ivy Artifacts and Libraries Support HTML5 Download Attribute with TypeScript and Angular 9 Angular 9.1+ Local Direction Query API: getLocaleDirection Example Angular 9.1 displayBlock CLI Component Generator Option by Example Angular 15 Basics Tutorial by Example Angular 9/8 ngFor Directive: Render Arrays with ngFor by Example Responsive Image Breakpoints Example with CDK's BreakpointObserver in Angular 9/8 Angular 9/8 DOM Queries: ViewChild and ViewChildren Example The Angular 9/8 Router: Route Parameters with Snapshot and ParamMap by Example Angular 9/8 Nested Routing and Child Routes by Example Angular 9 Examples: 2 Ways To Display A Component (Selector & Router) Angular 9/8 Tutorial: Http POST to Node/Express.js Example Angular 9/8 Feature and Root Modules by Example Angular 9/8 with PHP: Consuming a RESTful CRUD API with HttpClient and Forms Angular 9/8 with PHP and MySQL Database: REST CRUD Example & Tutorial Unit Testing Angular 9/8 Apps Tutorial with Jasmine & Karma by Example Angular 9 Web Components: Custom Elements & Shadow DOM Angular 9 Renderer2 with Directives Tutorial by Example Build Progressive Web Apps (PWA) with Angular 9/8 Tutorial and Example Angular 9 Internationalization/Localization with ngx-translate Tutorial and Example Create Angular 9 Calendar with ngx-bootstrap datepicker Example and Tutorial Multiple File Upload with Angular 9 FormData and PHP by Example Angular 9/8 Reactive Forms with Validation Tutorial by Example Angular 9/8 Template Forms Tutorial: Example Authentication Form (ngModel/ngForm/ngSubmit) Angular 9/8 JAMStack By Example Angular HttpClient v9/8 — Building a Service for Sending API Calls and Fetching Data Styling An Angular 9/8/7 Example App with Bootstrap 4 Navbar, Jumbotron, Tables, Forms and CardsHands-on Angular eBook
Subscribe to our Angular newsletter and get our hands-on Angular book for free!
