trigger the keydown.enter event on the child element

Question

trigger the keydown.enter event on the child element

I am facing a challenge in trying to trigger a "keydown.enter" event from a parent component to a child component. Despite my efforts, I have not been successful in achieving this. Can someone provide me with guidance on how I can make this work?

ParentComponent.html

<form [formGroup]='parentForm'>
  <div>
    <input type='search' placeholder="search (keydown.enter)="search($event)">
  </div>
  <app-child (keydown.enter)="search()" [childForm]="parentForm.controls.childForm"> 
  </app-child>
</form>

ChildComponent.ts

@Output() keydownEnter = new EventEmitter(); // The keydown.enter does not seem to function as expected

ngAfterViewInit() {
  // Attempting to implement something like.. 
  this.keydownEnter.emit({ 
    // Unfortunately, the keydown.enter is not producing the desired result
  });
}

angular typescript

Answer 1

Answer №1

keydown.enter is not a recognized identifier in TypeScript or JavaScript.

I have recreated your code snippet below:

//child component
  @HostListener('document:keydown.enter', ['$event']) onKeydownHandler(event: KeyboardEvent) {
    this.keydownEnter.emit(event)
    
}

  @Output() keydownEnter = new EventEmitter();





//parent component html

<app-child (keydownEnter)="Search()" ></app-child>






 // parent component 
Search() {
  console.log("event")
}

Answer 2

keydown.enter is not a recognized identifier in TypeScript or JavaScript.

I have recreated your code snippet below:

//child component
  @HostListener('document:keydown.enter', ['$event']) onKeydownHandler(event: KeyboardEvent) {
    this.keydownEnter.emit(event)
    
}

  @Output() keydownEnter = new EventEmitter();





//parent component html

<app-child (keydownEnter)="Search()" ></app-child>






 // parent component 
Search() {
  console.log("event")
}

Answer 3

Answer №2

To start off, I believe that implementing an @Input in your ChildComponent would be more appropriate than using an @Output. The ChildComponent should be listening for events rather than emitting them.

Here is a possible implementation:

ParentComponent.html

<form [formGroup]='parentForm'>
  <div>
    <input type="search" placeholder="search" (keydown.enter)="_search$.next($event.target.value)">
  </div>
  <app-child [search]="search$" [childForm]="parentForm.controls.childForm"> 
  </app-child>
</form>

ParentComponent.ts

public _search$ = new Subject();
public search$ = this._search$.asObservable();

ChildComponent.ts

@Input() search: Observable<string>;


ngOnInit() {
  this.search.subscribe(val => 
  // Perform action with searched input
  );
}

Answer 4

To start off, I believe that implementing an @Input in your ChildComponent would be more appropriate than using an @Output. The ChildComponent should be listening for events rather than emitting them.

Here is a possible implementation:

ParentComponent.html

<form [formGroup]='parentForm'>
  <div>
    <input type="search" placeholder="search" (keydown.enter)="_search$.next($event.target.value)">
  </div>
  <app-child [search]="search$" [childForm]="parentForm.controls.childForm"> 
  </app-child>
</form>

ParentComponent.ts

public _search$ = new Subject();
public search$ = this._search$.asObservable();

ChildComponent.ts

@Input() search: Observable<string>;


ngOnInit() {
  this.search.subscribe(val => 
  // Perform action with searched input
  );
}

Answer 5

Answer №3

To trigger an update in the child component, you can utilize Subject and Symbol as identifiers.

Parent component:

class ParentComponent {
  reloadSubject: BehaviorSubject<symbol> = new BehaviorSubject(Symbol(''));

  search() {
    // your code...
    this.reloadSubject.next(Symbol(''));
  }  
}

<form [formGroup]='parentForm'>
   <div>
      <input type='search' placeholder="search" (keydown.enter)="search($event)">
   </div>
   <app-child [reload] = "reloadSubject | async" [childForm] = "parentForm.controls.childForm"> </app-child>
</form>

Child component:

@Input() set reload(data: symbol) {
  // Perform necessary logic for the child component here...
}

Answer 6

To trigger an update in the child component, you can utilize Subject and Symbol as identifiers.

Parent component:

class ParentComponent {
  reloadSubject: BehaviorSubject<symbol> = new BehaviorSubject(Symbol(''));

  search() {
    // your code...
    this.reloadSubject.next(Symbol(''));
  }  
}

<form [formGroup]='parentForm'>
   <div>
      <input type='search' placeholder="search" (keydown.enter)="search($event)">
   </div>
   <app-child [reload] = "reloadSubject | async" [childForm] = "parentForm.controls.childForm"> </app-child>
</form>

Child component:

@Input() set reload(data: symbol) {
  // Perform necessary logic for the child component here...
}

trigger the keydown.enter event on the child element

Answer №1

Answer №2

Answer №3

Similar questions

Struggling with Angular's UI not refreshing when the model is updated

Pass information from a parent component to a child component without using the @Input decorator

Tips for resolving issues with mat-autocomplete during scrolling

Best method for integrating widget scripts in Angular 5

Is it possible to initialize ckeditor with a base64 encoded string?

Can TypeScript ascertain the object's type dynamically based on the key of its proxy name?

Having difficulty with the day selection in react-dropdown-date issue

do not proceed with instructions

The call stack size has reached its maximum limit;

Issue encountered when attempting to refresh the user interface despite receiving the accurate data in the ngrx

Pause and be patient while in the function that delivers an observable

Guide on showing error message according to personalized validation regulations in Angular 2?

Pass a React component as a required prop in Typescript when certain props are necessary

Here is a way to retrieve the name of a ref object stored in an array using Vue.js 3 and Typescript

Leverage ngrx to streamline action creation for multiple feature modules

Definitions for images in the following format

Error message "process.nextTick(() => { throw err; });" encountered while attempting to build an Angular image in a Docker environment

Is it possible to verify a file's type with Nestjs Pipes and the FileTypeValidator?

The function tokenNotExpired encounters an error when attempting to access the localStorage, as it

TypeScript throws an error if trying to access an Object variable using a String