angular component that takes a parameter with a function

Is there a way for my angular2 component to accept a function as a parameter?

Uncaught Error: Template parse errors: Can't bind to 'click' since it isn't a known property of 'input'. (" minlength="{{minlength}}"

[ERROR ->]click="{{click}}"

"): ng:///AppModule/InputTextComponent.html@12:2

ComponentInput.ts

    import { Component, OnInit, ViewEncapsulation, Input, Output, EventEmitter } from '@angular/core';
import { NgModel } from '@angular/forms';

@Component({
  selector: 'app-input-text',
  templateUrl: './input-text.component.html',
  styleUrls: ['./input-text.component.css'],
  encapsulation: ViewEncapsulation.None
})
export class InputTextComponent implements OnInit {

  @Input() id: string;
  @Input() name: string;

  @Output() click = new EventEmitter();  

  constructor() { }

  ngOnInit() {
  }

}

Template Input Component:

    <input 
  type="text" 
  id="{{id}}" 
  name="{{name}}" 
  click="{{click}}"
  >

Component.ts

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {

  clique() {
    console.log('Clicando...')
  }
}

Componente.html

<app-input-text 
      id="2" 
      name="nome" 
      (click)="clique(event)"
      ngDefaultControl>

    </app-input-text>

Answer №1

It's not possible to do that.

For instance, let's consider ngModel as our example: when you utilize the code

[(ngModel)]="x"

You are actually dealing with 3 different scenarios:

  • ngModel is an inherent directive attribute; if used independently, it sends a string to the tag
  • [ngModel] represents an Input where data is sent to the tag
  • (ngModel) signifies an Output where the tag sends data to you

In your specific scenario, you are attempting to send a string to your input, however, the input isn't set up to accept Inputs.

Nevertheless, the input is configured to accept event outputs like clicks. To make it function properly, you need to format it in this manner:

<input (click)="clique()">

If there are still any uncertainties, please don't hesitate to ask!

EDIT Alternatively, you can structure your input as follows:

<input [id]="id" [name]="name" (click)="clique($event)">

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